Frequencies for first 10,000 rows of pct012c077 variable in sf12000860us18 dataset :

   74 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,673       96.73       96.73
          1 |        276        2.76       99.49
          2 |         32        0.32       99.81
          3 |          8        0.08       99.89
          4 |          2        0.02       99.91
          5 |          2        0.02       99.93
          6 |          1        0.01       99.94
          7 |          4        0.04       99.98
         10 |          1        0.01       99.99
         24 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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