Frequencies for first 10,000 rows of primcare variable in nhamcsopd2007 dataset :

    is this |
 clinic the |
  patient's |
    primary |
       care |
  provider? |      Freq.     Percent        Cum.
------------+-----------------------------------
      blank |        181        1.81        1.81
    unknown |        820        8.20       10.01
        yes |      3,063       30.63       40.64
         no |      5,936       59.36      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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