Frequencies for first 10,000 rows of pct012k020 variable in sf12010860us30 dataset :

   17 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,721       87.21       87.21
          1 |        912        9.12       96.33
          2 |        236        2.36       98.69
          3 |         71        0.71       99.40
          4 |         14        0.14       99.54
          5 |         11        0.11       99.65
          6 |          7        0.07       99.72
          7 |          5        0.05       99.77
          8 |          5        0.05       99.82
          9 |          1        0.01       99.83
         10 |          2        0.02       99.85
         12 |          1        0.01       99.86
         14 |          1        0.01       99.87
         17 |          1        0.01       99.88
         20 |          1        0.01       99.89
         30 |          1        0.01       99.90
         31 |          1        0.01       99.91
         32 |          1        0.01       99.92
         35 |          1        0.01       99.93
         36 |          1        0.01       99.94
         48 |          1        0.01       99.95
         58 |          1        0.01       99.96
         61 |          1        0.01       99.97
         76 |          1        0.01       99.98
         82 |          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