Frequencies for first 10,000 rows of pct012f080 variable in sf12010860us25 dataset :

   77 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,182       91.82       91.82
          1 |        440        4.40       96.22
          2 |        128        1.28       97.50
          3 |         64        0.64       98.14
          4 |         46        0.46       98.60
          5 |         37        0.37       98.97
          6 |         24        0.24       99.21
          7 |         14        0.14       99.35
          8 |         14        0.14       99.49
          9 |          7        0.07       99.56
         10 |         11        0.11       99.67
         11 |          6        0.06       99.73
         12 |          3        0.03       99.76
         13 |          3        0.03       99.79
         14 |          9        0.09       99.88
         15 |          1        0.01       99.89
         16 |          4        0.04       99.93
         17 |          1        0.01       99.94
         18 |          3        0.03       99.97
         19 |          1        0.01       99.98
         20 |          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