Frequencies for first 10,000 rows of pct012k184 variable in sf12000860us26 dataset :

   77 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,695       96.95       96.95
          1 |        257        2.57       99.52
          2 |         32        0.32       99.84
          3 |          5        0.05       99.89
          5 |          1        0.01       99.90
          6 |          2        0.02       99.92
          7 |          2        0.02       99.94
          9 |          1        0.01       99.95
         10 |          1        0.01       99.96
         11 |          1        0.01       99.97
         12 |          2        0.02       99.99
         24 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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