Frequencies for first 10,000 rows of prdiag2 variable in nhamcsed2011 dataset :

 For diagnosis |
    2, is this |
     probable, |
 questionable, |
   or ruleout? |      Freq.     Percent        Cum.
---------------+-----------------------------------
Not applicable |      5,591       55.91       55.91
            No |      4,238       42.38       98.29
           Yes |        171        1.71      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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