Visualisation has been done of the most popular collection areas at Montreal Public Library, Canada. It turns out that manga is really really popular. You can see the branch by branch breakdown of who uses the library, and what is the collection mix at each branch.
More information and the visualisations are available from The Gazette website. Make sure you explore the different data option, and mouse over the visualisations as they present different data.
Via Infodocket at Library Journal