Frequencies for first 10,000 rows of pateven variable in namcs2010 dataset :

       does |
  physician |
        see |
patients in |
     office |
evenings/we |
    ekends? |      Freq.     Percent        Cum.
------------+-----------------------------------
    unknown |         35        0.35        0.35
        yes |      4,004       40.04       40.39
         no |      5,961       59.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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