Frequencies for first 10,000 rows of pct012k097 variable in sf12010860us30 dataset :

   94 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,980       99.80       99.80
          1 |         17        0.17       99.97
          2 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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