Frequencies for first 10,000 rows of prdiag1 variable in nhamcsed2004 dataset :

      is diag1 |
     probable, |
 questionable, |
   or ruleout? |      Freq.     Percent        Cum.
---------------+-----------------------------------
            no |      9,525       95.25       95.25
           yes |        123        1.23       96.48
not applicable |        352        3.52      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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