There have been almost 84 million chapter downloads across Springer Nature's open access books portfolio since we started tracking downloads from SpringerLink in 2013. Around 40% of the downloads were via institutional access and 60% came from anonymous users.
There are various points to consider, when discussing usage statistics:
• These books were published over a period of time
• Books vary in length depending on book type
• The average number of downloads can vary considerably by discipline.