Frequencies for first 10,000 rows of pct012e150 variable in sf12010860us24 dataset :

   43 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,743       97.43       97.43
          1 |        238        2.38       99.81
          2 |         16        0.16       99.97
          3 |          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