Frequencies for first 10,000 rows of pct012k084 variable in sf12000860us26 dataset :

   81 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,870       98.70       98.70
          1 |        105        1.05       99.75
          2 |         16        0.16       99.91
          3 |          4        0.04       99.95
          4 |          1        0.01       99.96
          5 |          2        0.02       99.98
          6 |          1        0.01       99.99
          7 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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