Frequencies for first 10,000 rows of nodisp variable in nhamcsopd2006 dataset :

          no answer to disposition item |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
One or more answers to the disposition  |      9,806       98.06       98.06
      No answer to the disposition item |        194        1.94      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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