Frequencies for first 10,000 rows of pct012f077 variable in sf12000860us21 dataset :

   74 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,294       92.94       92.94
          1 |        371        3.71       96.65
          2 |        111        1.11       97.76
          3 |         60        0.60       98.36
          4 |         33        0.33       98.69
          5 |         25        0.25       98.94
          6 |         25        0.25       99.19
          7 |         16        0.16       99.35
          8 |          8        0.08       99.43
          9 |          9        0.09       99.52
         10 |          9        0.09       99.61
         11 |          9        0.09       99.70
         12 |          1        0.01       99.71
         13 |          7        0.07       99.78
         14 |          5        0.05       99.83
         15 |          2        0.02       99.85
         17 |          1        0.01       99.86
         18 |          2        0.02       99.88
         19 |          5        0.05       99.93
         20 |          1        0.01       99.94
         22 |          2        0.02       99.96
         23 |          1        0.01       99.97
         26 |          1        0.01       99.98
         27 |          1        0.01       99.99
         31 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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