Frequencies for first 10,000 rows of senbefor variable in namcs2006 dataset :

      have you/anyone in |
   practice seen patient |
                 before? |      Freq.     Percent        Cum.
-------------------------+-----------------------------------
yes, established patient |      8,927       89.27       89.27
         no, new patient |      1,073       10.73      100.00
-------------------------+-----------------------------------
                   Total |     10,000      100.00

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