Chart Criteria
There are 40 positions on this chart and it is solely based on radio airplay. This chart ranks the week's hottest pop songs, ranked by mainstream top 40 radio airplay detections as measured by Nielsen BDS Nielsen Broadcast Data Systems. Songs are ranked by the total number of spins detected per week.
Songs that are gaining plays or remaining flat from previous week will receive a bullet. A song will also receive a bullet if its percentage loss in plays does not exceed the percentage of monitored station downtime for the format. If two songs are tied in total plays, the song with the larger increase in plays is placed first. In the week December 3, 2005 songs below No. 20 are moved to recurrent after 20 weeks on the chart. Descending songs below No. 10 are moved to recurrent after 52 weeks on the chart.
This chart was often mistaken for and confused with the now discontinued Pop 100 Airplay chart. Whereas the Top 40 Mainstream and Pop 100 Airplay charts both measured the airplay of songs played on Mainstream stations playing pop-oriented music, the Pop 100 Airplay (like the Hot 100 Airplay) measures airplay was based on statistical impressions, while the Top 40 Mainstream chart used the number of total detections.
Read more about this topic: Top 40 Mainstream
Famous quotes containing the words chart and/or criteria:
“Perhaps in His wisdom the Almighty is trying to show us that a leader may chart the way, may point out the road to lasting peace, but that many leaders and many peoples must do the building.”
—Eleanor Roosevelt (1884–1962)
“We should have learnt by now that laws and court decisions can only point the way. They can establish criteria of right and wrong. And they can provide a basis for rooting out the evils of bigotry and racism. But they cannot wipe away centuries of oppression and injustice—however much we might desire it.”
—Hubert H. Humphrey (1911–1978)