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

   Tax Year |      Freq.     Percent        Cum.
------------+-----------------------------------
       1998 |          1        0.01        0.01
       1999 |          1        0.01        0.02
       2005 |          1        0.01        0.03
       2006 |          4        0.04        0.07
       2007 |          1        0.01        0.08
       2008 |          1        0.01        0.09
       2009 |          4        0.04        0.13
       2010 |         11        0.11        0.24
       2011 |         12        0.12        0.36
       2012 |         19        0.19        0.55
       2013 |         31        0.31        0.86
       2014 |         48        0.48        1.34
       2015 |        242        2.42        3.76
       2016 |        482        4.82        8.58
       2017 |      4,801       48.01       56.59
       2018 |      2,822       28.22       84.81
       2019 |         16        0.16       84.97
          . |      1,503       15.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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