Frequencies for first 10,000 rows of pct012e074 variable in sf12010880us24 dataset :

   71 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,958       99.58       99.58
          1 |         41        0.41       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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