Frequencies for first 10,000 rows of prdiag3 variable in nhamcsopd2003 dataset :

      is diag3 |
     probable, |
 questionable, |
   or ruleout? |      Freq.     Percent        Cum.
---------------+-----------------------------------
            no |      1,927       19.27       19.27
           yes |         34        0.34       19.61
not applicable |      8,039       80.39      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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