Frequencies for first 10,000 rows of pct012e161 variable in sf12010860us24 dataset :

   54 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,802       98.02       98.02
          1 |        185        1.85       99.87
          2 |          9        0.09       99.96
          3 |          3        0.03       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Apr 2017