Frequencies for first 10,000 rows of wtreduc variable in namcs2004 dataset :

     weight |
  reduction |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,780       97.80       97.80
          1 |        220        2.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016