Frequencies for first 10,000 rows of nodisp variable in nhamcsed1997 dataset :

      visit |
disposition |
: no answer |
    to item |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,897       98.97       98.97
          1 |        103        1.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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