Frequencies for first 10,000 rows of prdiag3 variable in nhamcsopd2009 dataset :

             for dx3, is this probable, |
              questionable, or ruleout? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                   no diagnosis entered |      7,956       79.56       79.56
dx is not probable, questionable, ruleo |      2,018       20.18       99.74
dx is probable, questionable, or ruleou |         26        0.26      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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