Frequencies for first 10,000 rows of pct012k192 variable in sf12010860us30 dataset :

   85 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,767       97.67       97.67
          1 |        199        1.99       99.66
          2 |         22        0.22       99.88
          3 |          4        0.04       99.92
          4 |          2        0.02       99.94
          6 |          2        0.02       99.96
          7 |          2        0.02       99.98
          9 |          1        0.01       99.99
         13 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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