Frequencies for first 10,000 rows of tax_period variable in eobmfne dataset : Tax Period | Freq. Percent Cum. ------------+----------------------------------- 199607 | 1 0.01 0.01 199709 | 1 0.01 0.02 199712 | 2 0.02 0.04 199806 | 1 0.01 0.05 199912 | 2 0.02 0.07 200006 | 1 0.01 0.08 200106 | 1 0.01 0.09 200112 | 2 0.02 0.11 200212 | 1 0.01 0.12 200412 | 2 0.02 0.14 200506 | 1 0.01 0.15 200512 | 3 0.03 0.18 200606 | 1 0.01 0.19 200612 | 5 0.05 0.24 200912 | 2 0.02 0.26 201006 | 1 0.01 0.27 201012 | 10 0.10 0.37 201106 | 1 0.01 0.38 201112 | 11 0.11 0.49 201206 | 2 0.02 0.51 201212 | 10 0.10 0.61 201306 | 2 0.02 0.63 201307 | 2 0.02 0.65 201312 | 45 0.45 1.10 201406 | 20 0.20 1.30 201408 | 1 0.01 1.31 201412 | 22 0.22 1.53 201505 | 1 0.01 1.54 201506 | 3 0.03 1.57 201509 | 2 0.02 1.59 201510 | 1 0.01 1.60 201511 | 2 0.02 1.62 201512 | 70 0.70 2.32 201603 | 3 0.03 2.35 201604 | 5 0.05 2.40 201605 | 5 0.05 2.45 201606 | 26 0.26 2.71 201607 | 8 0.08 2.79 201608 | 4 0.04 2.83 201609 | 7 0.07 2.90 201610 | 5 0.05 2.95 201612 | 176 1.76 4.71 201701 | 3 0.03 4.74 201702 | 3 0.03 4.77 201703 | 7 0.07 4.84 201704 | 11 0.11 4.95 201705 | 39 0.39 5.34 201706 | 307 3.07 8.41 201707 | 55 0.55 8.96 201708 | 74 0.74 9.70 201709 | 116 1.16 10.86 201710 | 15 0.15 11.01 201711 | 24 0.24 11.25 201712 | 3,906 39.06 50.31 201801 | 22 0.22 50.53 201802 | 33 0.33 50.86 201803 | 164 1.64 52.50 201804 | 75 0.75 53.25 201805 | 171 1.71 54.96 201806 | 999 9.99 64.95 201807 | 117 1.17 66.12 201808 | 458 4.58 70.70 201809 | 240 2.40 73.10 201810 | 35 0.35 73.45 201811 | 11 0.11 73.56 201812 | 1,068 10.68 84.24 201901 | 7 0.07 84.31 201902 | 6 0.06 84.37 . | 1,563 15.63 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 15 Apr 2019