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

    physician specialty |
      recode (3 groups) |      Freq.     Percent        Cum.
------------------------+-----------------------------------
 primary care specialty |      9,373       93.73       93.73
surgical care specialty |        182        1.82       95.55
 medical care specialty |        445        4.45      100.00
------------------------+-----------------------------------
                  Total |     10,000      100.00

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