Frequencies for first 10,000 rows of pct012c069 variable in sf12010860us22 dataset :

   66 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,135       91.35       91.35
          1 |        662        6.62       97.97
          2 |        141        1.41       99.38
          3 |         32        0.32       99.70
          4 |         10        0.10       99.80
          5 |          4        0.04       99.84
          6 |          4        0.04       99.88
          7 |          1        0.01       99.89
          8 |          1        0.01       99.90
         10 |          2        0.02       99.92
         11 |          1        0.01       99.93
         12 |          1        0.01       99.94
         14 |          2        0.02       99.96
         19 |          1        0.01       99.97
         20 |          1        0.01       99.98
         27 |          1        0.01       99.99
         43 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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