Originally Posted by AnemicOak
That would be assuming all checkouts are for the maximum and that no one returns a book early.
Most people do borrow at the default of the maximum time the library allows. Most people do not know you can return early or even how.
Say it is 21-days maximum and some do know about early return and changing the borrow time. It would still be a wait time of between 2 & 3 years.