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

   Tax Year |      Freq.     Percent        Cum.
------------+-----------------------------------
       1990 |          1        0.01        0.01
       1998 |          2        0.02        0.03
       1999 |          1        0.01        0.04
       2001 |          1        0.01        0.05
       2002 |          1        0.01        0.06
       2003 |          4        0.04        0.10
       2004 |          2        0.02        0.12
       2005 |          4        0.04        0.16
       2006 |          8        0.08        0.24
       2007 |          2        0.02        0.26
       2008 |          3        0.03        0.29
       2009 |          7        0.07        0.36
       2010 |         16        0.16        0.52
       2011 |          2        0.02        0.54
       2012 |          6        0.06        0.60
       2013 |         28        0.28        0.88
       2014 |         21        0.21        1.09
       2015 |        159        1.59        2.68
       2016 |        329        3.29        5.97
       2017 |      4,841       48.41       54.38
       2018 |      2,708       27.08       81.46
       2019 |          6        0.06       81.52
          . |      1,848       18.48      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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