Frequencies for first 10,000 rows of prdiag1 variable in nhamcsopd2008 dataset :

             for dx1, is this probable, |
              questionable, or ruleout? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                   no diagnosis entered |         72        0.72        0.72
dx is not probable, questionable, ruleo |      9,815       98.15       98.87
dx is probable, questionable, or ruleou |        113        1.13      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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