Frequencies for first 10,000 rows of specr variable in namcs2009 dataset :

      physician specialty |
       recode (15 groups) |      Freq.     Percent        Cum.
--------------------------+-----------------------------------
  general/family practice |      5,623       56.23       56.23
        internal medicine |      1,771       17.71       73.94
               pediatrics |      1,792       17.92       91.86
          general surgery |          6        0.06       91.92
obstetrics and gynecology |        129        1.29       93.21
       orthopedic surgery |         82        0.82       94.03
  cardiovascular diseases |         28        0.28       94.31
                neurology |         32        0.32       94.63
        other specialties |        537        5.37      100.00
--------------------------+-----------------------------------
                    Total |     10,000      100.00

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