Frequencies for first 10,000 rows of specr variable in namcs2011 dataset :

Physician specialty group |      Freq.     Percent        Cum.
--------------------------+-----------------------------------
  General/family practice |      4,305       43.05       43.05
        Internal medicine |      1,544       15.44       58.49
               Pediatrics |      2,576       25.76       84.25
          General surgery |        672        6.72       90.97
Obstetrics and gynecology |        126        1.26       92.23
       Orthopedic surgery |         77        0.77       93.00
  Cardiovascular diseases |         22        0.22       93.22
              Dermatology |         85        0.85       94.07
                  Urology |         13        0.13       94.20
               Psychiatry |         65        0.65       94.85
           Otolaryngology |         21        0.21       95.06
        Other specialties |        468        4.68       99.74
                 Oncology |         26        0.26      100.00
--------------------------+-----------------------------------
                    Total |     10,000      100.00

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