Frequencies for first 10,000 rows of pct012n067 variable in sf12000860us29 dataset :

   64 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,769       97.69       97.69
          1 |        177        1.77       99.46
          2 |         37        0.37       99.83
          3 |         10        0.10       99.93
          4 |          1        0.01       99.94
          5 |          1        0.01       99.95
          6 |          2        0.02       99.97
          9 |          1        0.01       99.98
         10 |          1        0.01       99.99
         12 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017