Frequencies for first 10,000 rows of pct012o202 variable in sf12000860us30 dataset :

   95 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,892       98.92       98.92
          1 |         97        0.97       99.89
          2 |          9        0.09       99.98
          3 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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