History
BBC News - Football League names Npower as new sponsor
http://news.bbc.co.uk/1/hi/business/8570749.stmarchive.ph
https://archive.today/20051102201410/http://www.thefa.com/TheFA/NewsFromTheFA/Postings/2005/08/Features_ChampionshipSuccess.htmCoca-Cola end Football League sponsorship deal
https://www.theguardian.com/football/2009/sep/30/coca-cola-football-league-sponsorship
EFL Championship
Major League Soccer attendance - Wikipedia
https://en.wikipedia.org/wiki/Major_League_Soccer_attendance#MLS_attendance_vs._other_soccer_leagues_worldwide