Number of volumes held by academic libraries in the United States in 2012*
Other statistics on the topic
Trend in budget changes at academic libraries in the U.S. in 2016
U.S. academic library collection circulation in 2015, by type of degree granted
Faculty/librarian opinion on academic library service quality U.S./Canada 2015
Amount of money spent on librarian salaries/wages at academic libraries in 2015 U.S.