Frequencies for first 10,000 rows of prdiag1 variable in nhamcsopd2003 dataset :

      is diag1 |
     probable, |
 questionable, |
   or ruleout? |      Freq.     Percent        Cum.
---------------+-----------------------------------
            no |      9,743       97.43       97.43
           yes |         98        0.98       98.41
not applicable |        159        1.59      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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