Frequencies for first 10,000 rows of pct012k093 variable in sf12010860us30 dataset :

   90 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,949       99.49       99.49
          1 |         42        0.42       99.91
          2 |          8        0.08       99.99
          5 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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