Frequencies for low variable in drg1998 dataset :

 Low Volume |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        465       92.45       92.45
          * |         38        7.55      100.00
------------+-----------------------------------
      Total |        503      100.00

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