Frequencies for first 10,000 rows of specr variable in namcs2004 dataset :

      physician specialty |
                   recode |      Freq.     Percent        Cum.
--------------------------+-----------------------------------
  General/family practice |      1,374       13.74       13.74
        Internal medicine |        702        7.02       20.76
               Pediatrics |        890        8.90       29.66
          General surgery |        658        6.58       36.24
Obstetrics and gynecology |        602        6.02       42.26
       Orthopedic surgery |        574        5.74       48.00
  Cardiovascular diseases |        606        6.06       54.06
              Dermatology |        755        7.55       61.61
                  Urology |        675        6.75       68.36
               Psychiatry |        724        7.24       75.60
                Neurology |        673        6.73       82.33
            Ophthalmology |        459        4.59       86.92
           Otolaryngology |        546        5.46       92.38
        Other specialties |        762        7.62      100.00
--------------------------+-----------------------------------
                    Total |     10,000      100.00

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