Frequencies for first 10,000 rows of pct012c200 variable in sf12010860us22 dataset :

   93 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,909       99.09       99.09
          1 |         85        0.85       99.94
          2 |          4        0.04       99.98
          6 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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