Frequencies for first 10,000 rows of pct012e195 variable in sf12010880us24 dataset :

   88 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,986       99.86       99.86
          1 |         12        0.12       99.98
          3 |          1        0.01       99.99
          5 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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