Frequencies for first 10,000 rows of pct012k148 variable in sf12010860us30 dataset :

   41 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,773       87.73       87.73
          1 |        882        8.82       96.55
          2 |        222        2.22       98.77
          3 |         67        0.67       99.44
          4 |         17        0.17       99.61
          5 |         10        0.10       99.71
          6 |          6        0.06       99.77
          7 |          2        0.02       99.79
          8 |          2        0.02       99.81
          9 |          3        0.03       99.84
         10 |          4        0.04       99.88
         13 |          1        0.01       99.89
         14 |          1        0.01       99.90
         16 |          1        0.01       99.91
         18 |          1        0.01       99.92
         22 |          1        0.01       99.93
         30 |          2        0.02       99.95
         31 |          1        0.01       99.96
         51 |          1        0.01       99.97
         52 |          1        0.01       99.98
         56 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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