Frequencies for first 10,000 rows of tax_period variable in eobmfil dataset : Tax Period | Freq. Percent Cum. ------------+----------------------------------- 200406 | 2 0.02 0.02 200412 | 1 0.01 0.03 200512 | 1 0.01 0.04 200602 | 1 0.01 0.05 200806 | 5 0.05 0.10 200812 | 2 0.02 0.12 200912 | 4 0.04 0.16 201012 | 2 0.02 0.18 201112 | 2 0.02 0.20 201203 | 1 0.01 0.21 201210 | 1 0.01 0.22 201306 | 1 0.01 0.23 201312 | 13 0.13 0.36 201406 | 2 0.02 0.38 201408 | 1 0.01 0.39 201412 | 13 0.13 0.52 201503 | 1 0.01 0.53 201504 | 1 0.01 0.54 201505 | 1 0.01 0.55 201506 | 2 0.02 0.57 201509 | 2 0.02 0.59 201510 | 6 0.06 0.65 201511 | 1 0.01 0.66 201512 | 115 1.15 1.81 201601 | 1 0.01 1.82 201603 | 1 0.01 1.83 201604 | 4 0.04 1.87 201605 | 5 0.05 1.92 201606 | 44 0.44 2.36 201607 | 11 0.11 2.47 201608 | 12 0.12 2.59 201609 | 5 0.05 2.64 201610 | 2 0.02 2.66 201611 | 3 0.03 2.69 201612 | 207 2.07 4.76 201701 | 1 0.01 4.77 201702 | 2 0.02 4.79 201703 | 12 0.12 4.91 201704 | 19 0.19 5.10 201705 | 37 0.37 5.47 201706 | 284 2.84 8.31 201707 | 42 0.42 8.73 201708 | 64 0.64 9.37 201709 | 86 0.86 10.23 201710 | 29 0.29 10.52 201711 | 39 0.39 10.91 201712 | 4,194 41.94 52.85 201801 | 28 0.28 53.13 201802 | 41 0.41 53.54 201803 | 194 1.94 55.48 201804 | 140 1.40 56.88 201805 | 203 2.03 58.91 201806 | 1,095 10.95 69.86 201807 | 149 1.49 71.35 201808 | 372 3.72 75.07 201809 | 126 1.26 76.33 201810 | 30 0.30 76.63 201811 | 14 0.14 76.77 201812 | 1,044 10.44 87.21 201901 | 8 0.08 87.29 201902 | 4 0.04 87.33 . | 1,267 12.67 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 15 Apr 2019