Frequencies for first 10,000 rows of pct012e076 variable in sf12010860us24 dataset :

   73 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,965       99.65       99.65
          1 |         32        0.32       99.97
          2 |          2        0.02       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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