Frequencies for first 10,000 rows of pct012k189 variable in sf12010860us30 dataset :

   82 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,742       97.42       97.42
          1 |        213        2.13       99.55
          2 |         27        0.27       99.82
          3 |          7        0.07       99.89
          4 |          3        0.03       99.92
          5 |          1        0.01       99.93
          6 |          1        0.01       99.94
          7 |          2        0.02       99.96
          8 |          1        0.01       99.97
         10 |          1        0.01       99.98
         12 |          1        0.01       99.99
         19 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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