Lincoln, Neb.--The readership of business and trade publications by adults increased 42% between 1999 and 2000, meaning that 20.7 million more adults are reading these publications daily, according to the Media Intelligence 2000 study released this week by Fairfield Research. Additionally, the study indicated that the time adults spend reading business and trade magazines increased 39% between 1999 and 2000. Meanwhile, the time adults spent with newspapers was up 12%. The time spent on the Internet was flat. Consumer magazines (-24%), radio (-12%) and television (-5%) all declined in terms of time spent with the medium.