Frequencies for tax_year variable in eobmfak dataset :

   Tax Year |      Freq.     Percent        Cum.
------------+-----------------------------------
       1998 |          1        0.02        0.02
       1999 |          1        0.02        0.04
       2001 |          3        0.06        0.09
       2004 |          1        0.02        0.11
       2006 |          1        0.02        0.13
       2007 |          1        0.02        0.15
       2008 |          1        0.02        0.17
       2009 |          1        0.02        0.18
       2010 |          2        0.04        0.22
       2011 |          4        0.07        0.29
       2012 |          4        0.07        0.37
       2013 |          8        0.15        0.51
       2014 |         11        0.20        0.72
       2015 |         76        1.39        2.11
       2016 |        226        4.15        6.26
       2017 |      2,459       45.11       51.37
       2018 |      1,613       29.59       80.96
       2019 |          7        0.13       81.09
          . |      1,031       18.91      100.00
------------+-----------------------------------
      Total |      5,451      100.00

by Jean Roth , jroth@nber.org , 15 Apr 2019