Frequencies for first 10,000 rows of prdiag1 variable in nhamcsed2003 dataset :

      is diag1 |
     probable, |
 questionable, |
   or ruleout? |      Freq.     Percent        Cum.
---------------+-----------------------------------
            no |      9,708       97.08       97.08
           yes |        121        1.21       98.29
not applicable |        171        1.71      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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