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

has patient been seen in |
     this clinic before? |      Freq.     Percent        Cum.
-------------------------+-----------------------------------
yes, established patient |      8,400       84.00       84.00
         no, new patient |      1,600       16.00      100.00
-------------------------+-----------------------------------
                   Total |     10,000      100.00

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