Frequencies for first 10,000 rows of pct012k056 variable in sf12010860us30 dataset :

   53 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,709       87.09       87.09
          1 |        986        9.86       96.95
          2 |        197        1.97       98.92
          3 |         58        0.58       99.50
          4 |         15        0.15       99.65
          5 |         13        0.13       99.78
          6 |          3        0.03       99.81
          7 |          5        0.05       99.86
          8 |          1        0.01       99.87
         10 |          2        0.02       99.89
         15 |          1        0.01       99.90
         18 |          1        0.01       99.91
         24 |          1        0.01       99.92
         27 |          1        0.01       99.93
         31 |          1        0.01       99.94
         32 |          1        0.01       99.95
         34 |          1        0.01       99.96
         49 |          1        0.01       99.97
         59 |          1        0.01       99.98
         60 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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