Frequencies for first 10,000 rows of pct012e187 variable in sf12010860us24 dataset :

   80 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,962       99.62       99.62
          1 |         37        0.37       99.99
          2 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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