Frequencies for first 10,000 rows of clintype variable in nhamcsopd2006 dataset :

          clinic type |      Freq.     Percent        Cum.
----------------------+-----------------------------------
     General medicine |      3,519       35.19       35.19
              Surgery |      2,108       21.08       56.27
           Pediatrics |      1,115       11.15       67.42
Obstetrics/Gynecology |      1,630       16.30       83.72
      Substance abuse |         93        0.93       84.65
                Other |      1,535       15.35      100.00
----------------------+-----------------------------------
                Total |     10,000      100.00

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