Frequencies for first 10,000 rows of prdiag2 variable in nhamcsed2009 dataset :

   is diag2 |
  probable, |
questionabl |
      e, or |
   ruleout? |      Freq.     Percent        Cum.
------------+-----------------------------------
         -7 |      5,800       58.00       58.00
          0 |      4,071       40.71       98.71
          1 |        129        1.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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