Frequencies for first 10,000 rows of pct012l099 variable in sf12000860us27 dataset :

   96 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,959       99.59       99.59
          1 |         37        0.37       99.96
          2 |          2        0.02       99.98
          3 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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