Frequencies for first 10,000 rows of pct012c037 variable in sf12000860us18 dataset :

   34 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,464       84.64       84.64
          1 |      1,019       10.19       94.83
          2 |        290        2.90       97.73
          3 |        106        1.06       98.79
          4 |         50        0.50       99.29
          5 |         25        0.25       99.54
          6 |         11        0.11       99.65
          7 |         12        0.12       99.77
          8 |          4        0.04       99.81
          9 |          2        0.02       99.83
         10 |          1        0.01       99.84
         11 |          1        0.01       99.85
         12 |          2        0.02       99.87
         13 |          1        0.01       99.88
         14 |          1        0.01       99.89
         16 |          2        0.02       99.91
         17 |          1        0.01       99.92
         20 |          1        0.01       99.93
         24 |          1        0.01       99.94
         35 |          1        0.01       99.95
         41 |          1        0.01       99.96
         46 |          1        0.01       99.97
         55 |          1        0.01       99.98
         69 |          1        0.01       99.99
         73 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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