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In the US, Billboard introduced the Hot 100 on August 4, 1958, as the first chart to fully integrate sales and airplay data. Before this, Billboard published separate rankings such as "Best Sellers in Stores," "Most Played by Jockeys" (later revived as Hot 100 Airplay), and "Most Played in Juke Boxes." From 1958 to 1991, the Hot 100 was based on radio playlists and retail surveys. On November 30, 1991,

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