Frequencies for first 10,000 rows of pct012o100 variable in sf12000860us30 dataset :

   97 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,978       99.78       99.78
          1 |         21        0.21       99.99
          2 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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