Frequencies for low variable in drg1994 dataset :

 Low Volume |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        456       92.31       92.31
          * |         38        7.69      100.00
------------+-----------------------------------
      Total |        494      100.00

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