Frequencies for first 10,000 rows of specr_17 variable in namcs2012 dataset :

 Physician specialty - 17 |
                   groups |      Freq.     Percent        Cum.
--------------------------+-----------------------------------
  General/family practice |      1,573       15.73       15.73
        Internal medicine |        897        8.97       24.70
               Pediatrics |      1,451       14.51       39.21
          General surgery |        198        1.98       41.19
Obstetrics and gynecology |        704        7.04       48.23
       Orthopedic surgery |        420        4.20       52.43
  Cardiovascular diseases |        319        3.19       55.62
              Dermatology |        500        5.00       60.62
                  Urology |        219        2.19       62.81
               Psychiatry |        595        5.95       68.76
                Neurology |        238        2.38       71.14
            Ophthalmology |        494        4.94       76.08
           Otolaryngology |        236        2.36       78.44
        Other specialties |      1,589       15.89       94.33
                 Oncology |        106        1.06       95.39
                  Allergy |        260        2.60       97.99
              Pulmonology |        201        2.01      100.00
--------------------------+-----------------------------------
                    Total |     10,000      100.00

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