Frequencies for first 10,000 rows of tax_period variable in eobmfga dataset : Tax Period | Freq. Percent Cum. ------------+----------------------------------- 200406 | 1 0.01 0.01 200412 | 1 0.01 0.02 200612 | 1 0.01 0.03 200707 | 2 0.02 0.05 200712 | 3 0.03 0.08 200806 | 2 0.02 0.10 200807 | 1 0.01 0.11 200812 | 1 0.01 0.12 200906 | 2 0.02 0.14 201012 | 10 0.10 0.24 201106 | 1 0.01 0.25 201112 | 4 0.04 0.29 201206 | 1 0.01 0.30 201212 | 4 0.04 0.34 201305 | 1 0.01 0.35 201308 | 1 0.01 0.36 201312 | 21 0.21 0.57 201405 | 1 0.01 0.58 201412 | 18 0.18 0.76 201504 | 1 0.01 0.77 201506 | 1 0.01 0.78 201509 | 13 0.13 0.91 201510 | 1 0.01 0.92 201512 | 193 1.93 2.85 201601 | 1 0.01 2.86 201602 | 2 0.02 2.88 201603 | 8 0.08 2.96 201604 | 1 0.01 2.97 201605 | 18 0.18 3.15 201606 | 43 0.43 3.58 201607 | 9 0.09 3.67 201608 | 4 0.04 3.71 201609 | 13 0.13 3.84 201610 | 4 0.04 3.88 201611 | 1 0.01 3.89 201612 | 436 4.36 8.25 201701 | 1 0.01 8.26 201702 | 2 0.02 8.28 201703 | 12 0.12 8.40 201704 | 10 0.10 8.50 201705 | 44 0.44 8.94 201706 | 310 3.10 12.04 201707 | 55 0.55 12.59 201708 | 34 0.34 12.93 201709 | 110 1.10 14.03 201710 | 13 0.13 14.16 201711 | 43 0.43 14.59 201712 | 4,055 40.55 55.14 201801 | 23 0.23 55.37 201802 | 18 0.18 55.55 201803 | 104 1.04 56.59 201804 | 56 0.56 57.15 201805 | 135 1.35 58.50 201806 | 804 8.04 66.54 201807 | 93 0.93 67.47 201808 | 61 0.61 68.08 201809 | 147 1.47 69.55 201810 | 16 0.16 69.71 201811 | 16 0.16 69.87 201812 | 1,210 12.10 81.97 201901 | 17 0.17 82.14 201902 | 8 0.08 82.22 . | 1,778 17.78 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 15 Apr 2019