Frequencies for first 10,000 rows of prdiag1 variable in nhamcsed1999 dataset :

   is diag1 |
  probable, |
questionabl |
       e or |
   ruleout? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,709       97.09       97.09
          1 |        195        1.95       99.04
          2 |         96        0.96      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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