Frequencies for first 10,000 rows of pct012k181 variable in sf12010860us30 dataset :

   74 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,561       95.61       95.61
          1 |        363        3.63       99.24
          2 |         41        0.41       99.65
          3 |         13        0.13       99.78
          4 |          6        0.06       99.84
          5 |          4        0.04       99.88
          6 |          2        0.02       99.90
          8 |          1        0.01       99.91
         10 |          1        0.01       99.92
         12 |          1        0.01       99.93
         13 |          1        0.01       99.94
         16 |          3        0.03       99.97
         26 |          1        0.01       99.98
         28 |          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