Frequencies for first 10,000 rows of pct012c168 variable in sf12000860us18 dataset :

   61 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,311       93.11       93.11
          1 |        542        5.42       98.53
          2 |         94        0.94       99.47
          3 |         31        0.31       99.78
          4 |          5        0.05       99.83
          5 |          4        0.04       99.87
          6 |          4        0.04       99.91
          7 |          2        0.02       99.93
         12 |          1        0.01       99.94
         13 |          1        0.01       99.95
         20 |          1        0.01       99.96
         22 |          1        0.01       99.97
         25 |          1        0.01       99.98
         41 |          1        0.01       99.99
         47 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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