Frequencies for first 10,000 rows of pct012c174 variable in sf12010860us22 dataset :

   67 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,092       90.92       90.92
          1 |        701        7.01       97.93
          2 |        128        1.28       99.21
          3 |         42        0.42       99.63
          4 |         12        0.12       99.75
          5 |          5        0.05       99.80
          6 |          2        0.02       99.82
          7 |          6        0.06       99.88
          8 |          1        0.01       99.89
          9 |          1        0.01       99.90
         11 |          1        0.01       99.91
         13 |          1        0.01       99.92
         14 |          2        0.02       99.94
         15 |          1        0.01       99.95
         17 |          2        0.02       99.97
         26 |          1        0.01       99.98
         32 |          1        0.01       99.99
         42 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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