Frequencies for first 10,000 rows of specr variable in namcs2008 dataset :

      physician specialty |
       recode (15 groups) |      Freq.     Percent        Cum.
--------------------------+-----------------------------------
  general/family practice |      4,822       48.22       48.22
        internal medicine |      1,940       19.40       67.62
               pediatrics |      2,562       25.62       93.24
          general surgery |         37        0.37       93.61
obstetrics and gynecology |        107        1.07       94.68
       orthopedic surgery |         58        0.58       95.26
  cardiovascular diseases |         96        0.96       96.22
              dermatology |         39        0.39       96.61
                  urology |         22        0.22       96.83
               psychiatry |         48        0.48       97.31
                neurology |         20        0.20       97.51
            ophthalmology |         56        0.56       98.07
        other specialties |        193        1.93      100.00
--------------------------+-----------------------------------
                    Total |     10,000      100.00

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