Frequencies for first 10,000 rows of pct012k203 variable in sf12010880us30 dataset :

   96 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,988       99.88       99.88
          1 |         10        0.10       99.98
          2 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 May 2017