Frequencies for first 10,000 rows of pct012n093 variable in sf12000860us29 dataset :

   90 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,978       99.78       99.78
          1 |         20        0.20       99.98
          2 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017