Frequencies for first 10,000 rows of region variable in nhamcsed1997 dataset :

 geographic |
  region of |
   hospital |      Freq.     Percent        Cum.
------------+-----------------------------------
  Northeast |      3,384       33.84       33.84
    Midwest |      2,496       24.96       58.80
      South |      1,921       19.21       78.01
       West |      2,199       21.99      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016