Frequencies for first 10,000 rows of prdiag1 variable in nhamcsed1997 dataset :

   is diag1 |
  probable, |
questionabl |
       e or |
   ruleout? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,601       96.01       96.01
          1 |        260        2.60       98.61
          2 |        139        1.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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