Frequencies for first 10,000 rows of speccat variable in namcs2011 dataset :

      Type of specialty |      Freq.     Percent        Cum.
------------------------+-----------------------------------
 Primary care specialty |      8,416       84.16       84.16
Surgical care specialty |        819        8.19       92.35
 Medical care specialty |        765        7.65      100.00
------------------------+-----------------------------------
                  Total |     10,000      100.00

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