Frequencies for first 10,000 rows of pct012n200 variable in sf12010860us33 dataset :

   93 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,971       99.71       99.71
          1 |         27        0.27       99.98
          2 |          1        0.01       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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