Frequencies for first 10,000 rows of prdiag3 variable in nhamcsopd2006 dataset :

   for dx3, is |
this probable, |
 questionable, |
   or ruleout? |      Freq.     Percent        Cum.
---------------+-----------------------------------
            No |      2,461       24.61       24.61
           Yes |         50        0.50       25.11
Not applicable |      7,489       74.89      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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