Frequencies for low variable in drg1996 dataset :

 Low Volume |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        459       92.73       92.73
          * |         36        7.27      100.00
------------+-----------------------------------
      Total |        495      100.00

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