Frequencies for first 10,000 rows of prdiag3 variable in nhamcsed2013 dataset :

 For diagnosis |
    3, is this |
     probable, |
 questionable, |
   or ruleout? |      Freq.     Percent        Cum.
---------------+-----------------------------------
Not applicable |      7,813       78.13       78.13
            No |      2,142       21.42       99.55
           Yes |         45        0.45      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016