Frequencies for first 10,000 rows of prdiag3 variable in namcs2002 dataset :

      Is DIAG3 |
     probable, |
 questionable, |
   or ruleout? |      Freq.     Percent        Cum.
---------------+-----------------------------------
            No |      1,959       19.59       19.59
           Yes |         55        0.55       20.14
Not applicable |      7,986       79.86      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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