Frequencies for first 10,000 rows of pct012e055 variable in sf12000860us20 dataset :

   52 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,827       98.27       98.27
          1 |        159        1.59       99.86
          2 |         14        0.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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