Frequencies for first 10,000 rows of tax_year variable in eobmfia dataset :

   Tax Year |      Freq.     Percent        Cum.
------------+-----------------------------------
       1989 |          1        0.01        0.01
       1996 |          2        0.02        0.03
       1999 |          1        0.01        0.04
       2000 |          3        0.03        0.07
       2001 |          2        0.02        0.09
       2005 |          1        0.01        0.10
       2006 |          6        0.06        0.16
       2007 |          1        0.01        0.17
       2009 |          2        0.02        0.19
       2010 |          9        0.09        0.28
       2011 |         12        0.12        0.40
       2012 |         16        0.16        0.56
       2013 |         47        0.47        1.03
       2014 |         68        0.68        1.71
       2015 |         87        0.87        2.58
       2016 |        204        2.04        4.62
       2017 |      3,327       33.27       37.89
       2018 |      3,284       32.84       70.73
       2019 |      1,693       16.93       87.66
          . |      1,234       12.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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