Frequencies for first 10,000 rows of prdiag1 variable in nhamcsopd2011 dataset :

             For dx1, is this probable, |
              questionable, or ruleout? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                   No diagnosis entered |         34        0.34        0.34
Dx is not probable, questionable, ruleo |      9,915       99.15       99.49
Dx is probable, questionable, or ruleou |         51        0.51      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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