Frequencies for first 10,000 rows of prdiag3 variable in nhamcsed1998 dataset :

   is diag3 |
  probable, |
questionabl |
       e or |
   ruleout? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        852        8.52        8.52
          1 |         75        0.75        9.27
          2 |      9,073       90.73      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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