Frequencies for first 10,000 rows of primcare variable in nhamcsopd2009 dataset :

    is this |
 clinic the |
  patient's |
    primary |
       care |
  provider? |      Freq.     Percent        Cum.
------------+-----------------------------------
      blank |        211        2.11        2.11
    unknown |      1,070       10.70       12.81
        yes |      2,245       22.45       35.26
         no |      6,474       64.74      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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