Frequencies for first 10,000 rows of pct012e197 variable in sf12010860us24 dataset :

   90 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,992       99.92       99.92
          1 |          6        0.06       99.98
          3 |          1        0.01       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Apr 2017