Frequencies for first 10,000 rows of pct012k151 variable in sf12010860us30 dataset :

   44 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,690       86.90       86.90
          1 |        913        9.13       96.03
          2 |        255        2.55       98.58
          3 |         75        0.75       99.33
          4 |         26        0.26       99.59
          5 |         10        0.10       99.69
          6 |          7        0.07       99.76
          7 |          5        0.05       99.81
          8 |          2        0.02       99.83
          9 |          3        0.03       99.86
         12 |          1        0.01       99.87
         13 |          2        0.02       99.89
         14 |          1        0.01       99.90
         17 |          2        0.02       99.92
         19 |          1        0.01       99.93
         20 |          1        0.01       99.94
         28 |          1        0.01       99.95
         40 |          1        0.01       99.96
         44 |          1        0.01       99.97
         51 |          1        0.01       99.98
         62 |          1        0.01       99.99
         73 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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