Frequencies for first 10,000 rows of pct012g069 variable in sf12000860us22 dataset :

   66 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,513       85.13       85.13
          1 |        929        9.29       94.42
          2 |        267        2.67       97.09
          3 |        102        1.02       98.11
          4 |         46        0.46       98.57
          5 |         44        0.44       99.01
          6 |         18        0.18       99.19
          7 |         23        0.23       99.42
          8 |         15        0.15       99.57
          9 |          6        0.06       99.63
         10 |          7        0.07       99.70
         11 |         12        0.12       99.82
         12 |          6        0.06       99.88
         13 |          3        0.03       99.91
         14 |          3        0.03       99.94
         15 |          1        0.01       99.95
         16 |          1        0.01       99.96
         17 |          2        0.02       99.98
         19 |          1        0.01       99.99
         20 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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