How We Chart The Year
By Geoff Mayfield
Please note that the information below pertains to all of Billboard's Year In Music charts, only a fraction of which appear in this special Billboard.com section. The full breadth of charts appear in the pages of Billboard's special double issue dated Dec. 23, 2006, and on Billboard.biz, where subscribers have full access to all of the year-end tallies.
It was her performance on Billboard's weekly charts that enabled hip-hop soul queen Mary J. Blige to lead nine Year In Music charts, more than any other artist during the 2006 chart year.
This annual scorecard of artist and record company success aggregates the numbers that determine Billboard's weekly charts.
Most of those numbers are based on data from Nielsen Music, with sales of physical and digital product compiled by Nielsen SoundScan, and radio airplay measured by Nielsen BDS. The ringtones category is based on sales tracked by Nielsen RingScan.More...
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