Frequencies for first 10,000 rows of pct012k185 variable in sf12000860us26 dataset :

   78 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,728       97.28       97.28
          1 |        223        2.23       99.51
          2 |         27        0.27       99.78
          3 |          8        0.08       99.86
          4 |          6        0.06       99.92
          5 |          1        0.01       99.93
          7 |          1        0.01       99.94
          8 |          1        0.01       99.95
         12 |          1        0.01       99.96
         17 |          1        0.01       99.97
         18 |          1        0.01       99.98
         19 |          1        0.01       99.99
         20 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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