Frequencies for first 10,000 rows of prdiag2 variable in namcs2007 dataset :

             for dx2, is this probable, |
              questionable, or ruleout? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                   no diagnosis entered |      4,455       44.55       44.55
dx is probable, questionable, or ruleou |         88        0.88       45.43
dx is not probable, questionable, ruleo |      5,457       54.57      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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