Frequencies for first 10,000 rows of pct012f094 variable in sf12000860us21 dataset :

   91 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,840       98.40       98.40
          1 |        133        1.33       99.73
          2 |         18        0.18       99.91
          3 |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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