Frequencies for first 10,000 rows of primcare variable in namcs2002 dataset :

Are you the |
  patient's |
    primary |
       care |
 physician? |      Freq.     Percent        Cum.
------------+-----------------------------------
      Blank |        180        1.80        1.80
        Yes |      3,508       35.08       36.88
         No |      6,004       60.04       96.92
    Unknown |        308        3.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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