Frequencies for first 10,000 rows of nmedcare variable in namcs2007 dataset :

       for new |
     patients, |
       accepts |
      medicare |      Freq.     Percent        Cum.
---------------+-----------------------------------
         blank |         94        0.94        0.94
       unknown |        271        2.71        3.65
not applicable |        659        6.59       10.24
           yes |      7,145       71.45       81.69
            no |      1,831       18.31      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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