Using a survey with 78 responses to claim that 75% of people check their papers months in advance is like basing a study on the strength of a house by analyzing only one brick. The reason behind such a generalization with such a small sample is suspicious; who benefits from this such a stark conclusion? For my part, I more often see neighbors stressed at the town hall for a passport expired at the last minute before holidays, not months in advance. It is mainly travel companies that have an interest in making people think they should plan ahead to book.