Frequencies for first 10,000 rows of pct012k183 variable in sf12010860us30 dataset :

   76 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,605       96.05       96.05
          1 |        334        3.34       99.39
          2 |         41        0.41       99.80
          3 |          8        0.08       99.88
          5 |          2        0.02       99.90
          6 |          4        0.04       99.94
          7 |          1        0.01       99.95
         10 |          1        0.01       99.96
         12 |          1        0.01       99.97
         13 |          1        0.01       99.98
         20 |          1        0.01       99.99
         33 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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