I'm calling BS on those numbers.
Idk where Eurostat gets It's info from but I assume that if you go on the street and ask people about reading books, they'll lie.
70% reading several books, as in from start to finish, not just "read a few pages", in the past 12 months?
Either it's bullshit or the sampling is super biased. I'd believe those numbers of certain parts of the population, but in total? Nah.
I'd like to see how the data would've been affected if the interviewers had also tested that the people know what books they read and roughly what happened in them.