Frequencies for first 10,000 rows of specr variable in namcs2005 dataset :

      physician specialty |
   recoded into 15 groups |      Freq.     Percent        Cum.
--------------------------+-----------------------------------
  General/family practice |      4,430       44.30       44.30
        Internal medicine |      1,647       16.47       60.77
               Pediatrics |      2,616       26.16       86.93
          General surgery |        515        5.15       92.08
Obstetrics and gynecology |         51        0.51       92.59
       Orthopedic surgery |        105        1.05       93.64
  Cardiovascular diseases |         31        0.31       93.95
              Dermatology |         70        0.70       94.65
                  Urology |         33        0.33       94.98
               Psychiatry |         22        0.22       95.20
            Ophthalmology |         70        0.70       95.90
           Otolaryngology |         48        0.48       96.38
        Other specialties |        362        3.62      100.00
--------------------------+-----------------------------------
                    Total |     10,000      100.00

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