Frequencies for first 10,000 rows of pct012e121 variable in sf12000860us20 dataset :

   14 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,734       97.34       97.34
          1 |        244        2.44       99.78
          2 |         19        0.19       99.97
          3 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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