lag	cov
0	.6429924
1	.4864844
2	.4509188
3	.4270839
4	.4099075
5	.3961325
6	.3828455
7	.3723177
8	.3616842
9	.3518491
10	.34388
11	.3342696
12	.324457
13	.3161835
14	.30886
15	.3025859
16	.2952571
17	.2883164
18	.2832721
19	.2769339
20	.2637606
21	.2554619
22	.245665
