Frequencies for first 10,000 rows of prdiag3 variable in nhamcsopd2004 dataset :

      is diag3 |
     probable, |
 questionable, |
   or ruleout? |      Freq.     Percent        Cum.
---------------+-----------------------------------
            no |      2,093       20.93       20.93
           yes |         60        0.60       21.53
not applicable |      7,847       78.47      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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