National Endowment for the Arts (2004)

Literary reading is in dramatic decline with fewer than half of American adults now reading literature, according to a National Endowment for the Arts (NEA) survey … Reading at Risk: A Survey of Literary Reading in America reports drops in all groups studied, with the steepest rate of decline - 28 percent - occurring in the youngest age groups. The study also documents an overall decline of 10 percentage points in literary readers from 1982 to 2002, representing a loss of 20 million potential readers. The rate of decline is increasing and, according to the survey, has nearly tripled in the last decade.
http://www.nea.gov/news/news04/ReadingAtRisk.html