Frequencies for first 10,000 rows of prdiag2 variable in nhamcsed2003 dataset :

      is diag2 |
     probable, |
 questionable, |
   or ruleout? |      Freq.     Percent        Cum.
---------------+-----------------------------------
            no |      3,844       38.44       38.44
           yes |        227        2.27       40.71
not applicable |      5,929       59.29      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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