Frequencies for first 10,000 rows of tax_period variable in eobmfal dataset : Tax Period | Freq. Percent Cum. ------------+----------------------------------- 199712 | 1 0.01 0.01 200612 | 1 0.01 0.02 200809 | 1 0.01 0.03 200812 | 1 0.01 0.04 200906 | 1 0.01 0.05 200909 | 1 0.01 0.06 200912 | 1 0.01 0.07 201012 | 5 0.05 0.12 201110 | 1 0.01 0.13 201112 | 5 0.05 0.18 201212 | 3 0.03 0.21 201306 | 1 0.01 0.22 201312 | 4 0.04 0.26 201406 | 1 0.01 0.27 201409 | 1 0.01 0.28 201410 | 1 0.01 0.29 201412 | 14 0.14 0.43 201509 | 23 0.23 0.66 201510 | 2 0.02 0.68 201511 | 1 0.01 0.69 201512 | 182 1.82 2.51 201601 | 2 0.02 2.53 201602 | 1 0.01 2.54 201603 | 2 0.02 2.56 201604 | 2 0.02 2.58 201605 | 3 0.03 2.61 201606 | 23 0.23 2.84 201607 | 4 0.04 2.88 201608 | 5 0.05 2.93 201609 | 41 0.41 3.34 201610 | 6 0.06 3.40 201612 | 365 3.65 7.05 201701 | 2 0.02 7.07 201702 | 2 0.02 7.09 201703 | 8 0.08 7.17 201704 | 7 0.07 7.24 201705 | 37 0.37 7.61 201706 | 153 1.53 9.14 201707 | 44 0.44 9.58 201708 | 26 0.26 9.84 201709 | 282 2.82 12.66 201710 | 18 0.18 12.84 201711 | 12 0.12 12.96 201712 | 4,102 41.02 53.98 201801 | 32 0.32 54.30 201802 | 31 0.31 54.61 201803 | 110 1.10 55.71 201804 | 55 0.55 56.26 201805 | 149 1.49 57.75 201806 | 654 6.54 64.29 201807 | 103 1.03 65.32 201808 | 87 0.87 66.19 201809 | 1,031 10.31 76.50 201810 | 25 0.25 76.75 201811 | 12 0.12 76.87 201812 | 1,053 10.53 87.40 201901 | 8 0.08 87.48 201902 | 8 0.08 87.56 . | 1,244 12.44 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 15 Apr 2019