lag	cov
0	.6176034
1	.4887596
2	.4543507
3	.4319201
4	.4150942
5	.4002483
6	.387258
7	.3761056
8	.3664563
9	.35589
10	.347267
11	.3382479
12	.3290316
13	.3195521
14	.3094182
15	.3024842
16	.2944556
17	.2877008
18	.2783837
19	.2745815
20	.2679616
21	.2465927
22	.2360033
