Frequencies for first 10,000 rows of nodisp variable in namcs2005 dataset :

  no answer to disposition item |      Freq.     Percent        Cum.
--------------------------------+-----------------------------------
One or more dispositions marked |      9,796       97.96       97.96
   No visit dispositions marked |        204        2.04      100.00
--------------------------------+-----------------------------------
                          Total |     10,000      100.00

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