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

           are |
   performance |
   measures on |
   physician's |
      practice |
  available to |
       public? |      Freq.     Percent        Cum.
---------------+-----------------------------------
         blank |         32        0.32        0.32
       unknown |      1,121       11.21       11.53
not applicable |      5,539       55.39       66.92
           yes |      1,169       11.69       78.61
            no |      2,139       21.39      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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