Frequencies for first 10,000 rows of prdiag1 variable in nhamcsopd2009 dataset :

             for dx1, is this probable, |
              questionable, or ruleout? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                   no diagnosis entered |        195        1.95        1.95
dx is not probable, questionable, ruleo |      9,738       97.38       99.33
dx is probable, questionable, or ruleou |         67        0.67      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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