Frequencies for first 10,000 rows of pct012g179 variable in sf12000860us22 dataset :

   72 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,414       84.14       84.14
          1 |        990        9.90       94.04
          2 |        269        2.69       96.73
          3 |        122        1.22       97.95
          4 |         60        0.60       98.55
          5 |         49        0.49       99.04
          6 |         28        0.28       99.32
          7 |         13        0.13       99.45
          8 |         17        0.17       99.62
          9 |          9        0.09       99.71
         10 |          9        0.09       99.80
         11 |          6        0.06       99.86
         12 |          1        0.01       99.87
         13 |          3        0.03       99.90
         14 |          4        0.04       99.94
         15 |          1        0.01       99.95
         16 |          3        0.03       99.98
         17 |          1        0.01       99.99
         19 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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