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

   Tax Year |      Freq.     Percent        Cum.
------------+-----------------------------------
       1994 |          1        0.01        0.01
       1995 |          1        0.01        0.02
       1996 |          7        0.07        0.09
       1997 |          1        0.01        0.10
       1998 |          2        0.02        0.12
       1999 |          5        0.05        0.17
       2000 |          3        0.03        0.20
       2002 |          2        0.02        0.22
       2003 |          5        0.05        0.27
       2004 |          2        0.02        0.29
       2005 |          2        0.02        0.31
       2006 |          7        0.07        0.38
       2007 |          2        0.02        0.40
       2008 |          6        0.06        0.46
       2009 |          3        0.03        0.49
       2010 |         15        0.15        0.64
       2011 |         26        0.26        0.90
       2012 |        148        1.48        2.38
       2013 |         62        0.62        3.00
       2014 |         22        0.22        3.22
       2015 |         94        0.94        4.16
       2016 |        238        2.38        6.54
       2017 |      4,723       47.23       53.77
       2018 |      3,433       34.33       88.10
       2019 |         10        0.10       88.20
          . |      1,180       11.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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