Frequencies for first 10,000 rows of clintype variable in nhamcsopd2008 dataset :

          clinic type |      Freq.     Percent        Cum.
----------------------+-----------------------------------
     general medicine |      3,707       37.07       37.07
              surgery |      1,880       18.80       55.87
           pediatrics |      1,339       13.39       69.26
obstetrics/gynecology |      1,305       13.05       82.31
      substance abuse |        175        1.75       84.06
                other |      1,594       15.94      100.00
----------------------+-----------------------------------
                Total |     10,000      100.00

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