Frequencies for first 10,000 rows of pct012n188 variable in sf12010860us33 dataset :

   81 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,860       98.60       98.60
          1 |        118        1.18       99.78
          2 |         12        0.12       99.90
          3 |          7        0.07       99.97
          4 |          2        0.02       99.99
         10 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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