Frequencies for first 10,000 rows of pct012k041 variable in sf12010860us30 dataset :

   38 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,842       88.42       88.42
          1 |        868        8.68       97.10
          2 |        191        1.91       99.01
          3 |         56        0.56       99.57
          4 |          9        0.09       99.66
          5 |         12        0.12       99.78
          6 |          4        0.04       99.82
          7 |          3        0.03       99.85
         10 |          4        0.04       99.89
         17 |          1        0.01       99.90
         23 |          2        0.02       99.92
         25 |          1        0.01       99.93
         28 |          2        0.02       99.95
         29 |          1        0.01       99.96
         49 |          1        0.01       99.97
         53 |          1        0.01       99.98
         71 |          1        0.01       99.99
         86 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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