Hmmm, late 1980s. That's what, 30 years ago? Sometimes math is beautiful.From Wiki
Classic rock is a radio format which developed from the album-oriented rock (AOR) format in the early 1980s. In the United States, the classic rock format features music ranging generally from the mid-1960s to the late 1980s, primarily focusing on commercially successful hard rock popularized in the 1970s. The radio format became increasingly popular with the baby boomer demographic by the end of the 1990s.