Frequencies for first 10,000 rows of pct012n155 variable in sf12010860us33 dataset :

   48 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,162       91.62       91.62
          1 |        571        5.71       97.33
          2 |        130        1.30       98.63
          3 |         51        0.51       99.14
          4 |         22        0.22       99.36
          5 |         20        0.20       99.56
          6 |          7        0.07       99.63
          7 |         10        0.10       99.73
          8 |          2        0.02       99.75
          9 |          2        0.02       99.77
         10 |          4        0.04       99.81
         11 |          5        0.05       99.86
         12 |          1        0.01       99.87
         13 |          1        0.01       99.88
         14 |          1        0.01       99.89
         15 |          1        0.01       99.90
         17 |          1        0.01       99.91
         18 |          2        0.02       99.93
         23 |          1        0.01       99.94
         25 |          1        0.01       99.95
         26 |          1        0.01       99.96
         27 |          1        0.01       99.97
         35 |          1        0.01       99.98
         42 |          1        0.01       99.99
         48 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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