Frequencies for first 10,000 rows of pct012c078 variable in sf12010860us22 dataset :

   75 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,559       95.59       95.59
          1 |        376        3.76       99.35
          2 |         42        0.42       99.77
          3 |         11        0.11       99.88
          4 |          2        0.02       99.90
          5 |          3        0.03       99.93
          9 |          1        0.01       99.94
         11 |          2        0.02       99.96
         12 |          1        0.01       99.97
         13 |          1        0.01       99.98
         14 |          1        0.01       99.99
         17 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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