Honestly, how does a general survey on vacation habits directly inform about verification of identity documents? Time is such a scarce resource that even the best intentions can be thwarted by the reality of a missed appointment or a complex form.
Citizens' attention resources are finite, and bureaucracy consumes a disproportionate share, often at the last minute, not by choice, but by obligation.
For example, even if you plan to check your passport three months in advance, the limited availability of government services for renewal can force you to wait, regardless of your good intentions.
It's the practical reality that often dictates these behaviors more than stated intentions in a survey.