Frequencies for first 10,000 rows of pct012f084 variable in sf12010860us25 dataset :

   81 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,333       93.33       93.33
          1 |        373        3.73       97.06
          2 |        122        1.22       98.28
          3 |         48        0.48       98.76
          4 |         37        0.37       99.13
          5 |         20        0.20       99.33
          6 |         13        0.13       99.46
          7 |          9        0.09       99.55
          8 |         12        0.12       99.67
          9 |          8        0.08       99.75
         10 |          6        0.06       99.81
         11 |          6        0.06       99.87
         12 |          2        0.02       99.89
         13 |          4        0.04       99.93
         14 |          2        0.02       99.95
         15 |          1        0.01       99.96
         16 |          1        0.01       99.97
         19 |          1        0.01       99.98
         20 |          1        0.01       99.99
         21 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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