Frequencies for first 10,000 rows of prdiag2 variable in namcs2008 dataset :

             for dx2, is this probable, |
              questionable, or ruleout? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                   no diagnosis entered |      4,356       43.56       43.56
dx is probable, questionable, or ruleou |        104        1.04       44.60
dx is not probable, questionable, ruleo |      5,540       55.40      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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