Frequencies for first 10,000 rows of wttake variable in nhamcsopd2010 dataset :

     weight |
   measured |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      2,894       28.94       28.94
        yes |      7,106       71.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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