Frequencies for tax_year variable in eobmfnm dataset :

   Tax Year |      Freq.     Percent        Cum.
------------+-----------------------------------
       1998 |          2        0.02        0.02
       1999 |          2        0.02        0.04
       2000 |          1        0.01        0.05
       2002 |          1        0.01        0.06
       2003 |          1        0.01        0.07
       2004 |          1        0.01        0.08
       2006 |          2        0.02        0.09
       2007 |          4        0.04        0.13
       2008 |          5        0.05        0.18
       2009 |          6        0.06        0.24
       2010 |         10        0.09        0.33
       2011 |          7        0.07        0.40
       2012 |          5        0.05        0.45
       2013 |         17        0.16        0.61
       2014 |         45        0.43        1.03
       2015 |        129        1.22        2.25
       2016 |        366        3.47        5.72
       2017 |      4,470       42.33       48.04
       2018 |      3,190       30.21       78.25
       2019 |         13        0.12       78.37
          . |      2,284       21.63      100.00
------------+-----------------------------------
      Total |     10,561      100.00

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