Frequencies for first 10,000 rows of prdiag1 variable in nhamcsed2008 dataset :

      is diag1 |
     probable, |
 questionable, |
   or ruleout? |      Freq.     Percent        Cum.
---------------+-----------------------------------
not applicable |         53        0.53        0.53
            no |      9,865       98.65       99.18
           yes |         82        0.82      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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