Frequencies for first 10,000 rows of refothmd variable in nhamcsopd2005 dataset :

   refer to |
   other md |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      8,869       88.69       88.69
        yes |      1,131       11.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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