Frequencies for first 10,000 rows of prdiag2 variable in nhamcsopd1997 dataset :

   is diag2 |
  probable, |
questionabl |
       e or |
   ruleout? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,723       37.23       37.23
          1 |        143        1.43       38.66
          2 |      6,134       61.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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