OverDrive reported some 506 million digital lends (e-book, audiobook, and digital magazine) in 2021, a 16% increase over 2020. The data comes from more than 76,000 libraries and schools in 94 countries worldwide. https://www.publishersweekly.com/pw/by-topic/industry-news/libraries/article/88220-overdrive-reports-more-than-half-a-billion-digital-library-loans-in-2021.html