Frequencies for first 10,000 rows of senbefor variable in namcs2001 dataset :

      have you/anyone in |
   practice seen patient |
                 before? |      Freq.     Percent        Cum.
-------------------------+-----------------------------------
                   Blank |        187        1.87        1.87
Yes, established patient |      8,336       83.36       85.23
         No, new patient |      1,477       14.77      100.00
-------------------------+-----------------------------------
                   Total |     10,000      100.00

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