Frequencies for first 10,000 rows of specr variable in namcs1995 dataset :

      physician specialty |
                   recode |      Freq.     Percent        Cum.
--------------------------+-----------------------------------
  General/family practice |      5,999       59.99       59.99
        Internal medicine |      3,119       31.19       91.18
               Pediatrics |         70        0.70       91.88
          General surgery |         78        0.78       92.66
Obstetrics and gynecology |         95        0.95       93.61
       Orthopedic surgery |        101        1.01       94.62
  Cardiovascular diseases |         17        0.17       94.79
              Dermatology |         81        0.81       95.60
                  Urology |         29        0.29       95.89
               Psychiatry |         16        0.16       96.05
                Neurology |         11        0.11       96.16
            Ophthalmology |         68        0.68       96.84
           Otolaryngology |          9        0.09       96.93
        Other specialties |        307        3.07      100.00
--------------------------+-----------------------------------
                    Total |     10,000      100.00

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