“…Interlibrary loan (ILL) data have been used by librarians to provide useful insights into what materials patrons are seeking and in which subject areas a library's collections may need more depth [4]. ILL request data has also been used in combination with circulation, electronic resource use counts, and turnaway data (counts of user attempts to access electronic resources that result in a failure to access fulltext) to inform collection development decisions, primarily for monographs and journal articles [5], [6] but also for other formats such as standard documents [7].…”