Frequencies for first 10,000 rows of pct012n142 variable in sf12010860us33 dataset :

   35 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,042       90.42       90.42
          1 |        611        6.11       96.53
          2 |        162        1.62       98.15
          3 |         65        0.65       98.80
          4 |         42        0.42       99.22
          5 |         24        0.24       99.46
          6 |          4        0.04       99.50
          7 |         13        0.13       99.63
          8 |         10        0.10       99.73
          9 |          3        0.03       99.76
         10 |          2        0.02       99.78
         11 |          3        0.03       99.81
         12 |          2        0.02       99.83
         13 |          4        0.04       99.87
         14 |          2        0.02       99.89
         16 |          1        0.01       99.90
         18 |          2        0.02       99.92
         19 |          1        0.01       99.93
         20 |          1        0.01       99.94
         21 |          1        0.01       99.95
         32 |          1        0.01       99.96
         38 |          2        0.02       99.98
         43 |          1        0.01       99.99
         48 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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