Frequencies for first 10,000 rows of prdiag1 variable in nhamcsopd1999 dataset :

   is diag1 |
  probable, |
questionabl |
       e or |
   ruleout? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,701       97.01       97.01
          1 |        141        1.41       98.42
          2 |        158        1.58      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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