Frequencies for first 10,000 rows of prdiag2 variable in namcs2011 dataset :

             For dx2, is this probable, |
              questionable, or ruleout? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                   No diagnosis entered |      4,537       45.37       45.37
Dx is probable, questionable, or ruleou |         67        0.67       46.04
Dx is not probable, questionable, ruleo |      5,396       53.96      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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