Frequencies for first 10,000 rows of prdiag1 variable in nhamcsed2006 dataset :

      is diag1 |
     probable, |
 questionable, |
   or ruleout? |      Freq.     Percent        Cum.
---------------+-----------------------------------
            no |      9,655       96.55       96.55
           yes |         87        0.87       97.42
not applicable |        258        2.58      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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