According to an NEA report more than half of American adults "read a work of literature or a book (fiction or nonfiction) not required for work or school." The NEA defines literary reading in this case as novels or short stories, poetry, and plays.
But according to an article in the L. A. Times:
Adults who read novels, poetry, short fiction and plays have dropped in every age group since 2008. The biggest ground was lost among readers in middle age; 35- to 44-year-olds dropped by nearly 6%; and both 45- to 54-year-olds and 55- to 63-year-olds by 5%.
The NEA report also addresses other forms of art activities as well.