Frequencies for first 10,000 rows of prdiag2 variable in nhamcsed2013 dataset :

 For diagnosis |
    2, is this |
     probable, |
 questionable, |
   or ruleout? |      Freq.     Percent        Cum.
---------------+-----------------------------------
Not applicable |      5,119       51.19       51.19
            No |      4,791       47.91       99.10
           Yes |         90        0.90      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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