Frequencies for first 10,000 rows of pct012k091 variable in sf12000860us26 dataset :

   88 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,946       99.46       99.46
          1 |         51        0.51       99.97
          2 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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