Frequencies for type variable in drg2004 dataset :

Medical/Sur |
 gical Flag |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         32        5.53        5.53
         ** |          2        0.35        5.87
        MED |        252       43.52       49.40
     MED  * |         27        4.66       54.06
       SURG |        252       43.52       97.58
     SURG * |         14        2.42      100.00
------------+-----------------------------------
      Total |        579      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016