Frequencies for first 10,000 rows of pct012o174 variable in sf12010860us34 dataset :

   67 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,188       81.88       81.88
          1 |      1,212       12.12       94.00
          2 |        315        3.15       97.15
          3 |        164        1.64       98.79
          4 |         56        0.56       99.35
          5 |         29        0.29       99.64
          6 |         19        0.19       99.83
          7 |          6        0.06       99.89
          8 |          4        0.04       99.93
          9 |          2        0.02       99.95
         10 |          1        0.01       99.96
         11 |          1        0.01       99.97
         13 |          1        0.01       99.98
         14 |          1        0.01       99.99
         16 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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