Frequencies for first 10,000 rows of nodisp variable in nhamcsed1999 dataset :

      visit |
disposition |
: no answer |
    to item |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,884       98.84       98.84
          1 |        116        1.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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