Frequencies for first 10,000 rows of prdiag3 variable in nhamcsed2008 dataset :

      is diag3 |
     probable, |
 questionable, |
   or ruleout? |      Freq.     Percent        Cum.
---------------+-----------------------------------
not applicable |      8,239       82.39       82.39
            no |      1,694       16.94       99.33
           yes |         67        0.67      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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