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Billboard Hot 100 – Historical Rock Presence

The historical rock presence metric shows the effective chart share occupied by rock artists. “Effective chart share” is calculated by assigning song scores that are inversely correlated with song rank (i.e. score of 100 for rank 1, score of 99 for rank 2, and so on) and then calculating a total score for rock artists as a percentage of the highest score possible. Numbers closer to 100 indicate a larger rock presence and numbers closer to 0 indicate a smaller rock presence.