In terms of categories of grown-up literature, non-fiction was almost neck and neck with fiction. Plus, I was surprised to see that I spent more time reading tween/children's literature than reading young adult literature. This is especially surprising since I make a determined effort to read YA because I write YA novels. Moreover, I had at least 12 titles prescribed for me because of my participation in a young adult book club (which has sadly disbanded - although it was in serious decline for quite a few months).
So, here's my chart, outlining the categories of books read in 2015:
Out of 136 books read, 43 were fiction, 41 non-fiction, 27 tween/children's titles, 21 young adult, and 4 short story books.