Frequencies for first 10,000 rows of prdiag3 variable in nhamcsed2005 dataset :

      is diag3 |
     probable, |
 questionable, |
   or ruleout? |      Freq.     Percent        Cum.
---------------+-----------------------------------
            no |      1,646       16.46       16.46
           yes |         69        0.69       17.15
not applicable |      8,285       82.85      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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