Frequencies for first 10,000 rows of prdiag1 variable in namcs2013 dataset :

 Is diagnosis #1 probable, questionable |
                           or rule out? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                   No diagnosis entered |         53        0.53        0.53
Dx is probable, questionable, or ruleou |         34        0.34        0.87
Dx is not probable, questionable, ruleo |      9,913       99.13      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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