Frequencies for first 10,000 rows of primcare variable in nhamcsopd2005 dataset :

    are you |
  patient's |
    primary |
       care |
 physician? |      Freq.     Percent        Cum.
------------+-----------------------------------
      blank |        111        1.11        1.11
        yes |      3,379       33.79       34.90
         no |      6,156       61.56       96.46
    unknown |        354        3.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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