Frequencies for first 10,000 rows of specr variable in namcs2010 dataset :

      physician specialty |
       recode (15 groups) |      Freq.     Percent        Cum.
--------------------------+-----------------------------------
  general/family practice |      4,318       43.18       43.18
        internal medicine |      1,626       16.26       59.44
               pediatrics |      2,785       27.85       87.29
          general surgery |        456        4.56       91.85
obstetrics and gynecology |        153        1.53       93.38
       orthopedic surgery |         95        0.95       94.33
  cardiovascular diseases |         21        0.21       94.54
               psychiatry |         70        0.70       95.24
                neurology |         26        0.26       95.50
            ophthalmology |         41        0.41       95.91
           otolaryngology |         25        0.25       96.16
        other specialties |        318        3.18       99.34
                 oncology |         66        0.66      100.00
--------------------------+-----------------------------------
                    Total |     10,000      100.00

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