Frequencies for first 10,000 rows of prdiag2 variable in nhamcsed2012 dataset :

 For diagnosis |
    2, is this |
     probable, |
 questionable, |
   or ruleout? |      Freq.     Percent        Cum.
---------------+-----------------------------------
Not applicable |      5,824       58.24       58.24
            No |      4,048       40.48       98.72
           Yes |        128        1.28      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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