I live in Finland and even I am sceptical of this figure. Maybe that’s because I go once a year.

I will say it’s very very common for folks to use the library for its primary purpose of renting books - which of course requires a visit twice in a month - once to collect and once to return.

On the return trip, you collect another set of books, which you then also have to return in two weeks.

On the return trip, you collect another set of books, making it a habit.