Frequencies for first 10,000 rows of pct012e128 variable in sf12010860us24 dataset :

   21 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,634       96.34       96.34
          1 |        287        2.87       99.21
          2 |         58        0.58       99.79
          3 |         18        0.18       99.97
          4 |          2        0.02       99.99
          5 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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