Frequencies for first 10,000 rows of clintype variable in nhamcsopd2005 dataset :

          clinic type |      Freq.     Percent        Cum.
----------------------+-----------------------------------
     general medicine |      3,402       34.02       34.02
              surgery |      1,649       16.49       50.51
           pediatrics |      1,474       14.74       65.25
obstetrics/gynecology |      1,572       15.72       80.97
      substance abuse |        249        2.49       83.46
                other |      1,654       16.54      100.00
----------------------+-----------------------------------
                Total |     10,000      100.00

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