Frequencies for drgsys variable in drg1998 dataset :

 DRG System |
   - MS-DRG |
     System |
     Begins |
     FY2008 |      Freq.     Percent        Cum.
------------+-----------------------------------
        DRG |        503      100.00      100.00
------------+-----------------------------------
      Total |        503      100.00

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