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Kalecrunch;6843002 said:List sounds about right.
The 25th Anniversary Hot Rap Songs ranking is based on actual performance on the weekly Hot Rap Songs chart, since the chart’s inception in the March 11, 1989, issue. Rankings are based on an inverse point system, with weeks at No. 1 having the greatest value and weeks at lower positions proportionately less. Due to various changes in chart rules, chart length and methodology throughout the years, songs had varying reigns at No. 1 and on the chart. To ensure equitable representation of the biggest hits from all 25 years, certain time frames were weighted to account for the difference in turnover rates from those periods.
http://www.billboard.com/articles/l...rt-25th-anniversary-top-100-songs?list_page=0