Frequencies for first 10,000 rows of pct012e090 variable in sf12010880us24 dataset :

   87 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,994       99.94       99.94
          1 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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