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

           are |
   performance |
   measures on |
   physician's |
      practice |
  available to |
       public? |      Freq.     Percent        Cum.
---------------+-----------------------------------
           yes |      1,285       12.85       12.85
            no |      2,541       25.41       38.26
    don`t know |      1,819       18.19       56.45
not applicable |      3,734       37.34       93.79
         blank |        621        6.21      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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