Frequencies for first 10,000 rows of wttake variable in namcs2007 dataset :

     weight |
   measured |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      1,580       15.80       15.80
        yes |      8,420       84.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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