Frequencies for first 10,000 rows of pct012e015 variable in sf12000860us20 dataset :

   12 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,740       97.40       97.40
          1 |        233        2.33       99.73
          2 |         27        0.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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