Frequencies for first 10,000 rows of pct012k157 variable in sf12010860us30 dataset :

   50 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,586       85.86       85.86
          1 |      1,006       10.06       95.92
          2 |        231        2.31       98.23
          3 |         93        0.93       99.16
          4 |         28        0.28       99.44
          5 |         17        0.17       99.61
          6 |         14        0.14       99.75
          7 |          2        0.02       99.77
          8 |          5        0.05       99.82
          9 |          2        0.02       99.84
         10 |          5        0.05       99.89
         14 |          1        0.01       99.90
         23 |          1        0.01       99.91
         27 |          1        0.01       99.92
         30 |          1        0.01       99.93
         31 |          1        0.01       99.94
         34 |          1        0.01       99.95
         37 |          1        0.01       99.96
         53 |          1        0.01       99.97
         58 |          1        0.01       99.98
         78 |          1        0.01       99.99
         81 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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