Frequencies for first 10,000 rows of pateven variable in namcs2009 dataset :

       does |
  physician |
see pats in |
     office |
evenings/we |
    ekends? |      Freq.     Percent        Cum.
------------+-----------------------------------
      blank |        154        1.54        1.54
    unknown |         79        0.79        2.33
        yes |      3,974       39.74       42.07
         no |      5,793       57.93      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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