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

has patient been seen in |
     this clinic before? |      Freq.     Percent        Cum.
-------------------------+-----------------------------------
yes, established patient |      7,901       79.01       79.01
         no, new patient |      2,099       20.99      100.00
-------------------------+-----------------------------------
                   Total |     10,000      100.00

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