Dear librarian，we can find the statistical data in different cities in Finnish Public Libraries Statistics Database https://tilastot.kirjastot.fi/index.php?lang=en
But where can I find such data in library level? in each library not in city level，for instance，in Oodi，maunula house and other specific library？
These pages you can find visitors and loans:
Choose download at right side so you get excel file.
If you search by word collections you can get different book and other collections.