Frequencies for first 10,000 rows of pct012n174 variable in sf12010860us33 dataset :

   67 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,631       96.31       96.31
          1 |        295        2.95       99.26
          2 |         36        0.36       99.62
          3 |         19        0.19       99.81
          4 |          8        0.08       99.89
          5 |          2        0.02       99.91
          6 |          1        0.01       99.92
          9 |          1        0.01       99.93
         10 |          2        0.02       99.95
         12 |          1        0.01       99.96
         13 |          1        0.01       99.97
         16 |          1        0.01       99.98
         17 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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