Frequencies for first 10,000 rows of pct012e154 variable in sf12010860us24 dataset :

   47 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,744       97.44       97.44
          1 |        233        2.33       99.77
          2 |         19        0.19       99.96
          3 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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