Frequencies for low variable in drg2004 dataset :

 Low Volume |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        497       92.04       92.04
          * |         43        7.96      100.00
------------+-----------------------------------
      Total |        540      100.00

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