Frequencies for first 10,000 rows of specr variable in namcs1997 dataset :

      physician specialty |
                   recode |      Freq.     Percent        Cum.
--------------------------+-----------------------------------
  General/family practice |      1,996       19.96       19.96
        Internal medicine |      1,198       11.98       31.94
               Pediatrics |      1,193       11.93       43.87
          General surgery |        324        3.24       47.11
Obstetrics and gynecology |        572        5.72       52.83
       Orthopedic surgery |        277        2.77       55.60
  Cardiovascular diseases |        859        8.59       64.19
              Dermatology |        599        5.99       70.18
                  Urology |        258        2.58       72.76
               Psychiatry |        647        6.47       79.23
                Neurology |        300        3.00       82.23
            Ophthalmology |        423        4.23       86.46
           Otolaryngology |        388        3.88       90.34
        Other specialties |        966        9.66      100.00
--------------------------+-----------------------------------
                    Total |     10,000      100.00

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