Frequencies for first 10,000 rows of pct012o069 variable in sf12000860us30 dataset :

   66 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,743       87.43       87.43
          1 |        884        8.84       96.27
          2 |        214        2.14       98.41
          3 |         75        0.75       99.16
          4 |         29        0.29       99.45
          5 |         24        0.24       99.69
          6 |          9        0.09       99.78
          7 |          9        0.09       99.87
          8 |          6        0.06       99.93
          9 |          3        0.03       99.96
         10 |          1        0.01       99.97
         14 |          2        0.02       99.99
         18 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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