Frequencies for first 10,000 rows of prdiag3 variable in namcs2000 dataset :

   is diag3 |
  probable, |
questionabl |
       e or |
   ruleout? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,895       18.95       18.95
          1 |         64        0.64       19.59
          2 |      8,041       80.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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