Frequencies for first 10,000 rows of pateven variable in namcs2006 dataset :

       does |
  physician |
        see |
patients in |
     office |
evenings/we |
    ekends? |      Freq.     Percent        Cum.
------------+-----------------------------------
        yes |      4,182       41.82       41.82
         no |      5,744       57.44       99.26
 don't know |         20        0.20       99.46
      blank |         54        0.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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