Frequencies for first 10,000 rows of tax_period variable in eobmfin dataset : Tax Period | Freq. Percent Cum. ------------+----------------------------------- 199607 | 4 0.04 0.04 199612 | 1 0.01 0.05 199707 | 1 0.01 0.06 200006 | 1 0.01 0.07 200007 | 1 0.01 0.08 200207 | 4 0.04 0.12 200212 | 1 0.01 0.13 200312 | 1 0.01 0.14 200407 | 3 0.03 0.17 200505 | 1 0.01 0.18 200507 | 5 0.05 0.23 200612 | 6 0.06 0.29 200709 | 1 0.01 0.30 200712 | 1 0.01 0.31 200812 | 1 0.01 0.32 200912 | 3 0.03 0.35 201012 | 5 0.05 0.40 201103 | 1 0.01 0.41 201107 | 1 0.01 0.42 201108 | 1 0.01 0.43 201112 | 3 0.03 0.46 201212 | 4 0.04 0.50 201312 | 18 0.18 0.68 201406 | 4 0.04 0.72 201407 | 2 0.02 0.74 201411 | 1 0.01 0.75 201412 | 13 0.13 0.88 201504 | 1 0.01 0.89 201506 | 1 0.01 0.90 201507 | 1 0.01 0.91 201509 | 7 0.07 0.98 201511 | 1 0.01 0.99 201512 | 127 1.27 2.26 201601 | 1 0.01 2.27 201602 | 3 0.03 2.30 201603 | 3 0.03 2.33 201604 | 6 0.06 2.39 201605 | 9 0.09 2.48 201606 | 27 0.27 2.75 201607 | 2 0.02 2.77 201608 | 1 0.01 2.78 201609 | 4 0.04 2.82 201610 | 2 0.02 2.84 201611 | 4 0.04 2.88 201612 | 228 2.28 5.16 201702 | 11 0.11 5.27 201703 | 11 0.11 5.38 201704 | 16 0.16 5.54 201705 | 49 0.49 6.03 201706 | 296 2.96 8.99 201707 | 42 0.42 9.41 201708 | 52 0.52 9.93 201709 | 68 0.68 10.61 201710 | 22 0.22 10.83 201711 | 62 0.62 11.45 201712 | 3,810 38.10 49.55 201801 | 14 0.14 49.69 201802 | 46 0.46 50.15 201803 | 137 1.37 51.52 201804 | 107 1.07 52.59 201805 | 361 3.61 56.20 201806 | 1,192 11.92 68.12 201807 | 158 1.58 69.70 201808 | 82 0.82 70.52 201809 | 126 1.26 71.78 201810 | 16 0.16 71.94 201811 | 51 0.51 72.45 201812 | 1,037 10.37 82.82 201901 | 14 0.14 82.96 201902 | 13 0.13 83.09 . | 1,691 16.91 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 15 Apr 2019