Frequencies for first 10,000 rows of pct012n185 variable in sf12010860us33 dataset :

   78 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,815       98.15       98.15
          1 |        147        1.47       99.62
          2 |         24        0.24       99.86
          3 |          8        0.08       99.94
          4 |          1        0.01       99.95
          5 |          3        0.03       99.98
          6 |          1        0.01       99.99
         12 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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