Frequencies for first 10,000 rows of pct012f080 variable in sf12000860us21 dataset :

   77 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,417       94.17       94.17
          1 |        314        3.14       97.31
          2 |         94        0.94       98.25
          3 |         54        0.54       98.79
          4 |         31        0.31       99.10
          5 |         20        0.20       99.30
          6 |         12        0.12       99.42
          7 |         10        0.10       99.52
          8 |          9        0.09       99.61
          9 |         10        0.10       99.71
         10 |          6        0.06       99.77
         11 |          7        0.07       99.84
         12 |          1        0.01       99.85
         13 |          3        0.03       99.88
         14 |          5        0.05       99.93
         15 |          2        0.02       99.95
         16 |          1        0.01       99.96
         17 |          1        0.01       99.97
         18 |          1        0.01       99.98
         20 |          1        0.01       99.99
         22 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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