Weekly Top 40. Determined each week by national radio airplay, the billboard mainstream and the top 35 songs from the hot 100 chart.
Mike Saya's Weekly Top 40 pop music chart. Began April 7, 1991. Online broadcast began in 2000, ended in 2003, and began again at the end of 2007. Ended at end of 2008, and started again on July 20, 2009.