Frequencies for first 10,000 rows of clintype variable in nhamcsopd1996 dataset :

          clinic type |      Freq.     Percent        Cum.
----------------------+-----------------------------------
     General medicine |      4,439       44.39       44.39
              Surgery |      1,856       18.56       62.95
           Pediatrics |      1,104       11.04       73.99
Obstetrics/Gynecology |      1,535       15.35       89.34
      Substance abuse |         87        0.87       90.21
                Other |        979        9.79      100.00
----------------------+-----------------------------------
                Total |     10,000      100.00

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