Frequencies for first 10,000 rows of pct012n069 variable in sf12000860us29 dataset :

   66 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,807       98.07       98.07
          1 |        142        1.42       99.49
          2 |         31        0.31       99.80
          3 |         12        0.12       99.92
          4 |          4        0.04       99.96
          5 |          2        0.02       99.98
         10 |          1        0.01       99.99
         20 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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