Frequencies for first 10,000 rows of pct012k083 variable in sf12010860us30 dataset :

   80 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,764       97.64       97.64
          1 |        212        2.12       99.76
          2 |         15        0.15       99.91
          3 |          2        0.02       99.93
          4 |          2        0.02       99.95
          5 |          1        0.01       99.96
          7 |          2        0.02       99.98
          8 |          1        0.01       99.99
         16 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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