Frequencies for first 10,000 rows of prdiag2 variable in namcs2014 dataset :

 Is diagnosis $2 probable, questionable |
                           or rule out? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                   No diagnosis entered |      3,758       37.58       37.58
Dx is probable, questionable, or ruleou |         51        0.51       38.09
Dx is not probable, questionable, ruleo |      6,191       61.91      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017