Frequencies for first 10,000 rows of clintype variable in nhamcsopd2000 dataset :

          clinic type |      Freq.     Percent        Cum.
----------------------+-----------------------------------
     General medicine |      4,520       45.20       45.20
              Surgery |      1,729       17.29       62.49
           Pediatrics |      1,486       14.86       77.35
Obstetrics/Gynecology |      1,236       12.36       89.71
      Substance abuse |         58        0.58       90.29
                Other |        971        9.71      100.00
----------------------+-----------------------------------
                Total |     10,000      100.00

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