Frequencies for first 10,000 rows of nodisp variable in nhamcsopd2011 dataset :

          No answer to disposition item |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
One or more disposition categories mark |      9,825       98.25       98.25
       No disposition categories marked |        175        1.75      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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