Frequencies for first 10,000 rows of tax_period variable in eobmfky dataset : Tax Period | Freq. Percent Cum. ------------+----------------------------------- 199712 | 1 0.01 0.01 199806 | 1 0.01 0.02 199906 | 1 0.01 0.03 200106 | 1 0.01 0.04 200112 | 1 0.01 0.05 200212 | 1 0.01 0.06 200512 | 2 0.02 0.08 200612 | 4 0.04 0.12 200706 | 2 0.02 0.14 200806 | 1 0.01 0.15 200812 | 1 0.01 0.16 201006 | 1 0.01 0.17 201012 | 3 0.03 0.20 201103 | 1 0.01 0.21 201106 | 2 0.02 0.23 201112 | 1 0.01 0.24 201212 | 4 0.04 0.28 201304 | 1 0.01 0.29 201312 | 21 0.21 0.50 201405 | 1 0.01 0.51 201406 | 4 0.04 0.55 201408 | 3 0.03 0.58 201409 | 1 0.01 0.59 201412 | 14 0.14 0.73 201501 | 1 0.01 0.74 201505 | 1 0.01 0.75 201506 | 2 0.02 0.77 201509 | 9 0.09 0.86 201511 | 1 0.01 0.87 201512 | 116 1.16 2.03 201601 | 4 0.04 2.07 201603 | 4 0.04 2.11 201604 | 3 0.03 2.14 201605 | 4 0.04 2.18 201606 | 54 0.54 2.72 201607 | 9 0.09 2.81 201608 | 16 0.16 2.97 201609 | 6 0.06 3.03 201610 | 5 0.05 3.08 201611 | 1 0.01 3.09 201612 | 305 3.05 6.14 201701 | 2 0.02 6.16 201702 | 4 0.04 6.20 201703 | 9 0.09 6.29 201704 | 7 0.07 6.36 201705 | 37 0.37 6.73 201706 | 486 4.86 11.59 201707 | 29 0.29 11.88 201708 | 55 0.55 12.43 201709 | 119 1.19 13.62 201710 | 44 0.44 14.06 201711 | 24 0.24 14.30 201712 | 3,860 38.60 52.90 201801 | 21 0.21 53.11 201802 | 28 0.28 53.39 201803 | 172 1.72 55.11 201804 | 86 0.86 55.97 201805 | 119 1.19 57.16 201806 | 1,168 11.68 68.84 201807 | 113 1.13 69.97 201808 | 83 0.83 70.80 201809 | 169 1.69 72.49 201810 | 36 0.36 72.85 201811 | 20 0.20 73.05 201812 | 1,124 11.24 84.29 201901 | 7 0.07 84.36 201902 | 8 0.08 84.44 . | 1,556 15.56 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 15 Apr 2019