Frequencies for first 10,000 rows of specr variable in namcs2000 dataset :

      physician specialty |
                   recode |      Freq.     Percent        Cum.
--------------------------+-----------------------------------
  General/family practice |      3,344       33.44       33.44
        Internal medicine |      2,272       22.72       56.16
               Pediatrics |      2,391       23.91       80.07
          General surgery |      1,287       12.87       92.94
Obstetrics and gynecology |        195        1.95       94.89
       Orthopedic surgery |         94        0.94       95.83
  Cardiovascular diseases |         15        0.15       95.98
              Dermatology |         67        0.67       96.65
                  Urology |         23        0.23       96.88
               Psychiatry |         27        0.27       97.15
        Other specialties |        285        2.85      100.00
--------------------------+-----------------------------------
                    Total |     10,000      100.00

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