Frequencies for first 10,000 rows of primcare variable in namcs2012 dataset :

Are you the |
  patient's |
    primary |
       care |
 physician? |      Freq.     Percent        Cum.
------------+-----------------------------------
      Blank |         33        0.33        0.33
    Unknown |        481        4.81        5.14
        Yes |      3,513       35.13       40.27
         No |      5,973       59.73      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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