Frequencies for first 10,000 rows of clintype variable in nhamcsopd2009 dataset :

          clinic type |      Freq.     Percent        Cum.
----------------------+-----------------------------------
     general medicine |      3,641       36.41       36.41
              surgery |      1,714       17.14       53.55
           pediatrics |      1,239       12.39       65.94
obstetrics/gynecology |      1,569       15.69       81.63
      substance abuse |        109        1.09       82.72
                other |      1,728       17.28      100.00
----------------------+-----------------------------------
                Total |     10,000      100.00

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