Frequencies for first 10,000 rows of specr variable in namcs2002 dataset :

      Physician specialty |
                   recode |      Freq.     Percent        Cum.
--------------------------+-----------------------------------
  General/family practice |      1,896       18.96       18.96
        Internal medicine |        848        8.48       27.44
               Pediatrics |      1,050       10.50       37.94
          General surgery |        463        4.63       42.57
Obstetrics and gynecology |        516        5.16       47.73
       Orthopedic surgery |        493        4.93       52.66
  Cardiovascular diseases |        534        5.34       58.00
              Dermatology |        665        6.65       64.65
                  Urology |        640        6.40       71.05
               Psychiatry |        479        4.79       75.84
                Neurology |        494        4.94       80.78
            Ophthalmology |        564        5.64       86.42
           Otolaryngology |        551        5.51       91.93
        Other specialties |        807        8.07      100.00
--------------------------+-----------------------------------
                    Total |     10,000      100.00

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