Frequencies for first 10,000 rows of pct012k052 variable in sf12010860us30 dataset :

   49 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,650       86.50       86.50
          1 |        997        9.97       96.47
          2 |        224        2.24       98.71
          3 |         64        0.64       99.35
          4 |         30        0.30       99.65
          5 |         12        0.12       99.77
          6 |          1        0.01       99.78
          7 |          5        0.05       99.83
          8 |          4        0.04       99.87
          9 |          1        0.01       99.88
         10 |          1        0.01       99.89
         12 |          1        0.01       99.90
         20 |          1        0.01       99.91
         25 |          1        0.01       99.92
         27 |          2        0.02       99.94
         28 |          1        0.01       99.95
         34 |          1        0.01       99.96
         37 |          1        0.01       99.97
         50 |          1        0.01       99.98
         62 |          1        0.01       99.99
         68 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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