Frequencies for first 10,000 rows of region variable in namcs1996 dataset :

 geographic |
  region of |
  physician |
     office |      Freq.     Percent        Cum.
------------+-----------------------------------
  Northeast |      1,895       18.95       18.95
    Midwest |      2,365       23.65       42.60
      South |      3,241       32.41       75.01
       West |      2,499       24.99      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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