Frequencies for first 10,000 rows of pct012l100 variable in sf12000860us27 dataset :

   97 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,955       99.55       99.55
          1 |         42        0.42       99.97
          2 |          2        0.02       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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