Frequencies for first 10,000 rows of speccat variable in namcs2014 dataset :

      Type of specialty |
     (Primary, Medical, |
              Surgical) |      Freq.     Percent        Cum.
------------------------+-----------------------------------
 Primary care specialty |      4,942       49.42       49.42
Surgical care specialty |      2,059       20.59       70.01
 Medical care specialty |      2,999       29.99      100.00
------------------------+-----------------------------------
                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017