Frequencies for first 10,000 rows of specr variable in namcs2003 dataset :

      physician specialty |
                   recode |      Freq.     Percent        Cum.
--------------------------+-----------------------------------
  General/family practice |      1,652       16.52       16.52
        Internal medicine |        641        6.41       22.93
               Pediatrics |        731        7.31       30.24
          General surgery |        412        4.12       34.36
Obstetrics and gynecology |        575        5.75       40.11
       Orthopedic surgery |        572        5.72       45.83
  Cardiovascular diseases |        548        5.48       51.31
              Dermatology |        634        6.34       57.65
                  Urology |        517        5.17       62.82
               Psychiatry |        570        5.70       68.52
                Neurology |        719        7.19       75.71
            Ophthalmology |        611        6.11       81.82
           Otolaryngology |        928        9.28       91.10
        Other specialties |        890        8.90      100.00
--------------------------+-----------------------------------
                    Total |     10,000      100.00

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