Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsRatings of NFL Teams from 1985 to 2012http://demonstrations.wolfram.com/RatingsOfNFLTeamsFrom1985To2012/]]>http://demonstrations.wolfram.com/RatingsOfNFLTeamsFrom1985To2012/