Frequencies for first 10,000 rows of pct012e052 variable in sf12010860us24 dataset :

   49 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,760       97.60       97.60
          1 |        218        2.18       99.78
          2 |         18        0.18       99.96
          3 |          2        0.02       99.98
          4 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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