Frequencies for first 10,000 rows of prdiag2 variable in namcs2002 dataset :

      Is DIAG2 |
     probable, |
 questionable, |
   or ruleout? |      Freq.     Percent        Cum.
---------------+-----------------------------------
            No |      4,654       46.54       46.54
           Yes |        134        1.34       47.88
Not applicable |      5,212       52.12      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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