Frequencies for first 10,000 rows of pct012k160 variable in sf12010860us30 dataset :

   53 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,689       86.89       86.89
          1 |        939        9.39       96.28
          2 |        241        2.41       98.69
          3 |         70        0.70       99.39
          4 |         24        0.24       99.63
          5 |         10        0.10       99.73
          6 |          7        0.07       99.80
          7 |          2        0.02       99.82
          8 |          2        0.02       99.84
          9 |          3        0.03       99.87
         11 |          2        0.02       99.89
         12 |          1        0.01       99.90
         23 |          1        0.01       99.91
         24 |          1        0.01       99.92
         30 |          1        0.01       99.93
         31 |          1        0.01       99.94
         33 |          1        0.01       99.95
         37 |          1        0.01       99.96
         48 |          1        0.01       99.97
         61 |          1        0.01       99.98
         63 |          1        0.01       99.99
         69 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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