Frequencies for first 10,000 rows of prdiag3 variable in nhamcsed2009 dataset :

   is diag3 |
  probable, |
questionabl |
      e, or |
   ruleout? |      Freq.     Percent        Cum.
------------+-----------------------------------
         -7 |      8,417       84.17       84.17
          0 |      1,548       15.48       99.65
          1 |         35        0.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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