Frequencies for first 10,000 rows of prdiag1 variable in nhamcsed1998 dataset :

   is diag1 |
  probable, |
questionabl |
       e or |
   ruleout? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,624       96.24       96.24
          1 |        205        2.05       98.29
          2 |        171        1.71      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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