Frequencies for first 10,000 rows of primcare variable in namcs2013 dataset :

Are you the |
  patient's |
    primary |
       care |
 physician? |      Freq.     Percent        Cum.
------------+-----------------------------------
      Blank |        164        1.64        1.64
    Unknown |        386        3.86        5.50
        Yes |      3,578       35.78       41.28
         No |      5,872       58.72      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017