Frequencies for first 10,000 rows of pct013c032 variable in sf12010860us35 dataset :

   20 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,515       85.15       85.15
          1 |        906        9.06       94.21
          2 |        295        2.95       97.16
          3 |        112        1.12       98.28
          4 |         59        0.59       98.87
          5 |         32        0.32       99.19
          6 |         23        0.23       99.42
          7 |         12        0.12       99.54
          8 |         10        0.10       99.64
          9 |          7        0.07       99.71
         10 |          6        0.06       99.77
         11 |          5        0.05       99.82
         13 |          2        0.02       99.84
         14 |          2        0.02       99.86
         15 |          2        0.02       99.88
         17 |          1        0.01       99.89
         26 |          1        0.01       99.90
         27 |          2        0.02       99.92
         30 |          1        0.01       99.93
         36 |          1        0.01       99.94
         41 |          2        0.02       99.96
         53 |          1        0.01       99.97
         79 |          1        0.01       99.98
         81 |          1        0.01       99.99
         83 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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