Frequencies for first 10,000 rows of pct012o091 variable in sf12010860us34 dataset :

   88 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,716       97.16       97.16
          1 |        260        2.60       99.76
          2 |         22        0.22       99.98
          3 |          1        0.01       99.99
          5 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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