Frequencies for first 10,000 rows of nodisp variable in nhamcsed2003 dataset :

      visit |
disposition |
- no answer |
    to item |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,962       99.62       99.62
        yes |         38        0.38      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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