Frequencies for first 10,000 rows of pct012m187 variable in sf12010880us32 dataset :

   80 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,977       99.77       99.77
          1 |         23        0.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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