Frequencies for first 10,000 rows of prdiag3 variable in nhamcsed2012 dataset :

 For diagnosis |
    3, is this |
     probable, |
 questionable, |
   or ruleout? |      Freq.     Percent        Cum.
---------------+-----------------------------------
Not applicable |      8,400       84.00       84.00
            No |      1,547       15.47       99.47
           Yes |         53        0.53      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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