Frequencies for first 10,000 rows of pct012e019 variable in sf12000860us20 dataset :

   16 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,737       97.37       97.37
          1 |        236        2.36       99.73
          2 |         23        0.23       99.96
          3 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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