Frequencies for first 10,000 rows of nodisp variable in namcs2013 dataset :

 Visit disposition: no answer |
                      to item |      Freq.     Percent        Cum.
------------------------------+-----------------------------------
One or more categories marked |      9,886       98.86       98.86
         No categories marked |        114        1.14      100.00
------------------------------+-----------------------------------
                        Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017