Frequencies for tax_year variable in eobmfri dataset :

   Tax Year |      Freq.     Percent        Cum.
------------+-----------------------------------
       1994 |          1        0.01        0.01
       1995 |          1        0.01        0.02
       1997 |          1        0.01        0.04
       1998 |          1        0.01        0.05
       1999 |          1        0.01        0.06
       2004 |          1        0.01        0.07
       2006 |          1        0.01        0.08
       2007 |          3        0.04        0.12
       2008 |          2        0.02        0.14
       2009 |          5        0.06        0.20
       2010 |          2        0.02        0.23
       2011 |          4        0.05        0.28
       2012 |          5        0.06        0.34
       2013 |         21        0.25        0.59
       2014 |         20        0.24        0.83
       2015 |         68        0.82        1.64
       2016 |        222        2.66        4.30
       2017 |      4,447       53.31       57.62
       2018 |      2,670       32.01       89.63
       2019 |          9        0.11       89.74
          . |        856       10.26      100.00
------------+-----------------------------------
      Total |      8,341      100.00

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