I was curious about the oft cited quote "x% of Americans never read another book after high school" and I found this interesting StackExchange post with links to older studies by the National Endowment of the Arts [1]. It shows that reading rate has droped 16.5% from 1982-2002 for high school graduates from 54.2% to 37.7%. The trend is higher education::more reading, but it is dropping across the board.
[1] https://skeptics.stackexchange.com/questions/9446/do-33-of-h...