Frequencies for first 10,000 rows of prdiag1 variable in nhamcsed2007 dataset :

      is diag1 |
     probable, |
 questionable, |
   or ruleout? |      Freq.     Percent        Cum.
---------------+-----------------------------------
not applicable |         86        0.86        0.86
            no |      9,790       97.90       98.76
           yes |        124        1.24      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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