Frequencies for first 10,000 rows of prdiag2 variable in nhamcsed2006 dataset :

      is diag2 |
     probable, |
 questionable, |
   or ruleout? |      Freq.     Percent        Cum.
---------------+-----------------------------------
            no |      3,834       38.34       38.34
           yes |        190        1.90       40.24
not applicable |      5,976       59.76      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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