Frequencies for first 10,000 rows of pateven variable in namcs2008 dataset :

       does |
  physician |
see pats in |
     office |
evenings/we |
    ekends? |      Freq.     Percent        Cum.
------------+-----------------------------------
      blank |         25        0.25        0.25
    unknown |         10        0.10        0.35
        yes |      4,263       42.63       42.98
         no |      5,702       57.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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