Frequencies for first 10,000 rows of refothmd variable in nhamcsopd2003 dataset :

   refer to |
   other md |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      8,548       85.48       85.48
        yes |      1,452       14.52      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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