Frequencies for first 10,000 rows of pct012c038 variable in sf12000860us18 dataset :

   35 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,391       83.91       83.91
          1 |      1,060       10.60       94.51
          2 |        318        3.18       97.69
          3 |        113        1.13       98.82
          4 |         42        0.42       99.24
          5 |         27        0.27       99.51
          6 |         16        0.16       99.67
          7 |         10        0.10       99.77
          8 |          1        0.01       99.78
          9 |          3        0.03       99.81
         10 |          3        0.03       99.84
         11 |          3        0.03       99.87
         12 |          2        0.02       99.89
         13 |          1        0.01       99.90
         16 |          2        0.02       99.92
         20 |          1        0.01       99.93
         26 |          1        0.01       99.94
         28 |          1        0.01       99.95
         39 |          1        0.01       99.96
         43 |          1        0.01       99.97
         64 |          1        0.01       99.98
         67 |          1        0.01       99.99
         70 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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