Frequencies for first 10,000 rows of region variable in namcs1994 dataset :

 geographic |
  region of |
  physician |
     office |      Freq.     Percent        Cum.
------------+-----------------------------------
  Northeast |      2,588       25.88       25.88
    Midwest |      3,093       30.93       56.81
      South |      2,528       25.28       82.09
       West |      1,791       17.91      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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