Frequencies for first 10,000 rows of region variable in namcs1995 dataset :

 geographic |
  region of |
  physician |
     office |      Freq.     Percent        Cum.
------------+-----------------------------------
  Northeast |      2,015       20.15       20.15
    Midwest |      3,200       32.00       52.15
      South |      3,080       30.80       82.95
       West |      1,705       17.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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