----------------------------------------------------------------------------------------------------------------------------------------------------------
-> year = 2001

      Source |       SS           df       MS      Number of obs   =        27
-------------+----------------------------------   F(1, 25)        =      0.92
       Model |  .106350529         1  .106350529   Prob > F        =    0.3477
    Residual |  2.90325232        25  .116130093   R-squared       =    0.0353
-------------+----------------------------------   Adj R-squared   =   -0.0032
       Total |  3.00960285        26  .115753956   Root MSE        =    .34078

------------------------------------------------------------------------------
   mean_beta |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
bhck7204_inv |  -.0265656   .0277602    -0.96   0.348    -.0837388    .0306076
       _cons |   .8895979   .3761607     2.36   0.026     .1148803    1.664315
------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------------------------------------
-> year = 2002

      Source |       SS           df       MS      Number of obs   =        35
-------------+----------------------------------   F(1, 33)        =      0.15
       Model |  .021702715         1  .021702715   Prob > F        =    0.6981
    Residual |  4.67833401        33  .141767697   R-squared       =    0.0046
-------------+----------------------------------   Adj R-squared   =   -0.0255
       Total |  4.70003673        34  .138236374   Root MSE        =    .37652

------------------------------------------------------------------------------
   mean_beta |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
bhck7204_inv |   .0094667   .0241952     0.39   0.698    -.0397589    .0586923
       _cons |    .595249   .3203407     1.86   0.072    -.0564891    1.246987
------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------------------------------------
-> year = 2003

      Source |       SS           df       MS      Number of obs   =        35
-------------+----------------------------------   F(1, 33)        =      0.20
       Model |   .01650005         1   .01650005   Prob > F        =    0.6607
    Residual |  2.77552164        33  .084106716   R-squared       =    0.0059
-------------+----------------------------------   Adj R-squared   =   -0.0242
       Total |  2.79202169        34  .082118285   Root MSE        =    .29001

------------------------------------------------------------------------------
   mean_beta |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
bhck7204_inv |  -.0085459   .0192943    -0.44   0.661    -.0478004    .0307086
       _cons |   .8023788   .2598887     3.09   0.004     .2736313    1.331126
------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------------------------------------
-> year = 2004

      Source |       SS           df       MS      Number of obs   =        35
-------------+----------------------------------   F(1, 33)        =      8.74
       Model |   1.9163279         1   1.9163279   Prob > F        =    0.0057
    Residual |  7.23418366        33  .219217687   R-squared       =    0.2094
-------------+----------------------------------   Adj R-squared   =    0.1855
       Total |  9.15051157        34  .269132693   Root MSE        =    .46821

------------------------------------------------------------------------------
   mean_beta |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
bhck7204_inv |   .0959302   .0324458     2.96   0.006     .0299188    .1619416
       _cons |  -.3880184   .4237786    -0.92   0.367    -1.250202    .4741656
------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------------------------------------
-> year = 2005

      Source |       SS           df       MS      Number of obs   =        38
-------------+----------------------------------   F(1, 36)        =      3.15
       Model |   .87094653         1   .87094653   Prob > F        =    0.0846
    Residual |  9.96611876        36  .276836632   R-squared       =    0.0804
-------------+----------------------------------   Adj R-squared   =    0.0548
       Total |  10.8370653        37  .292893656   Root MSE        =    .52615

------------------------------------------------------------------------------
   mean_beta |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
bhck7204_inv |   .0580417   .0327232     1.77   0.085    -.0083241    .1244075
       _cons |   .2368369    .428018     0.55   0.583    -.6312239    1.104898
------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------------------------------------
-> year = 2006

      Source |       SS           df       MS      Number of obs   =        38
-------------+----------------------------------   F(1, 36)        =      3.05
       Model |  .721037379         1  .721037379   Prob > F        =    0.0891
    Residual |  8.50341074        36  .236205854   R-squared       =    0.0782
-------------+----------------------------------   Adj R-squared   =    0.0526
       Total |  9.22444812        37  .249309409   Root MSE        =    .48601

------------------------------------------------------------------------------
   mean_beta |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
bhck7204_inv |   .0513181   .0293723     1.75   0.089    -.0082516    .1108878
       _cons |   .3985937   .3774619     1.06   0.298    -.3669346    1.164122
------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------------------------------------
-> year = 2007

      Source |       SS           df       MS      Number of obs   =        38
-------------+----------------------------------   F(1, 36)        =      2.81
       Model |  .609432448         1  .609432448   Prob > F        =    0.1026
    Residual |  7.82156904        36  .217265807   R-squared       =    0.0723
-------------+----------------------------------   Adj R-squared   =    0.0465
       Total |  8.43100149        37  .227864905   Root MSE        =    .46612

------------------------------------------------------------------------------
   mean_beta |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
bhck7204_inv |   .0492251   .0293914     1.67   0.103    -.0103833    .1088335
       _cons |   .4837669   .3792697     1.28   0.210    -.2854278    1.252962
------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------------------------------------
-> year = 2008

      Source |       SS           df       MS      Number of obs   =        37
-------------+----------------------------------   F(1, 35)        =      5.32
       Model |  1.26838114         1  1.26838114   Prob > F        =    0.0271
    Residual |  8.34241118        35  .238354605   R-squared       =    0.1320
-------------+----------------------------------   Adj R-squared   =    0.1072
       Total |  9.61079232        36  .266966453   Root MSE        =    .48822

------------------------------------------------------------------------------
   mean_beta |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
bhck7204_inv |   .0764145   .0331255     2.31   0.027     .0091661    .1436629
       _cons |   .2629031   .4203602     0.63   0.536    -.5904735     1.11628
------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------------------------------------
-> year = 2009

      Source |       SS           df       MS      Number of obs   =        42
-------------+----------------------------------   F(1, 40)        =      0.44
       Model |  .058579009         1  .058579009   Prob > F        =    0.5126
    Residual |  5.36774803        40  .134193701   R-squared       =    0.0108
-------------+----------------------------------   Adj R-squared   =   -0.0139
       Total |  5.42632704        41   .13234944   Root MSE        =    .36632

------------------------------------------------------------------------------
   mean_beta |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
bhck7204_inv |    .015077   .0228196     0.66   0.513    -.0310433    .0611972
       _cons |   1.124532   .2589411     4.34   0.000     .6011925    1.647871
------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------------------------------------
-> year = 2010

      Source |       SS           df       MS      Number of obs   =        43
-------------+----------------------------------   F(1, 41)        =      0.95
       Model |  .136628959         1  .136628959   Prob > F        =    0.3345
    Residual |   5.8736173        41  .143258959   R-squared       =    0.0227
-------------+----------------------------------   Adj R-squared   =   -0.0011
       Total |  6.01024626        42  .143101102   Root MSE        =     .3785

------------------------------------------------------------------------------
   mean_beta |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
bhck7204_inv |   .0257617   .0263794     0.98   0.335    -.0275125     .079036
       _cons |   1.005207   .2996864     3.35   0.002     .3999778    1.610436
------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------------------------------------
-> year = 2011

      Source |       SS           df       MS      Number of obs   =        43
-------------+----------------------------------   F(1, 41)        =      6.91
       Model |  .849165761         1  .849165761   Prob > F        =    0.0120
    Residual |  5.03596525        41  .122828421   R-squared       =    0.1443
-------------+----------------------------------   Adj R-squared   =    0.1234
       Total |  5.88513101        42  .140122167   Root MSE        =    .35047

------------------------------------------------------------------------------
   mean_beta |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
bhck7204_inv |   .0710095   .0270066     2.63   0.012     .0164686    .1255504
       _cons |   .4300925   .3001959     1.43   0.160    -.1761654     1.03635
------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------------------------------------
-> year = 2012

      Source |       SS           df       MS      Number of obs   =        43
-------------+----------------------------------   F(1, 41)        =      0.39
       Model |  .027682803         1  .027682803   Prob > F        =    0.5337
    Residual |   2.8804566        41  .070255039   R-squared       =    0.0095
-------------+----------------------------------   Adj R-squared   =   -0.0146
       Total |   2.9081394        42  .069241414   Root MSE        =    .26506

------------------------------------------------------------------------------
   mean_beta |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
bhck7204_inv |   .0127642   .0203343     0.63   0.534    -.0283017    .0538301
       _cons |   .9117631   .2286598     3.99   0.000     .4499753    1.373551
------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------------------------------------
-> year = 2013

      Source |       SS           df       MS      Number of obs   =        44
-------------+----------------------------------   F(1, 42)        =      0.07
       Model |  .004178096         1  .004178096   Prob > F        =    0.7988
    Residual |  2.66621675        42  .063481351   R-squared       =    0.0016
-------------+----------------------------------   Adj R-squared   =   -0.0222
       Total |  2.67039485        43  .062102206   Root MSE        =    .25196

------------------------------------------------------------------------------
   mean_beta |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
bhck7204_inv |  -.0050714   .0197679    -0.26   0.799    -.0449646    .0348219
       _cons |   1.078257    .216232     4.99   0.000     .6418829    1.514631
------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------------------------------------
-> year = 2014

      Source |       SS           df       MS      Number of obs   =        34
-------------+----------------------------------   F(1, 32)        =      0.18
       Model |  .013243762         1  .013243762   Prob > F        =    0.6749
    Residual |  2.36528266        32  .073915083   R-squared       =    0.0056
-------------+----------------------------------   Adj R-squared   =   -0.0255
       Total |  2.37852643        33  .072076558   Root MSE        =    .27187

------------------------------------------------------------------------------
   mean_beta |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
bhck7204_inv |  -.0092543   .0218628    -0.42   0.675    -.0537873    .0352787
       _cons |   1.073542   .2264719     4.74   0.000     .6122335     1.53485
------------------------------------------------------------------------------
