Frequencies for first 10,000 rows of pct012n081 variable in sf12010880us33 dataset :

   78 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,898       98.98       98.98
          1 |         81        0.81       99.79
          2 |         12        0.12       99.91
          3 |          6        0.06       99.97
          4 |          1        0.01       99.98
          5 |          1        0.01       99.99
         12 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 May 2017