By the mid-2000s and early 2010s, most major U.S. sports leagues (barring the National Football League, which has historically stipulated that all games be shown on terrestrial television in at least the markets of the teams involved) had begun to steadily decrease their presence on broadcast television, and allow more of their content (including post-season coverage in many cases) to air on cable networks, and more recently, digital-only outlets. The NCAA Division I Men's Basketball Tournament and national championship games in college football have also largely moved to cable (since 2016, the semi-finals of the former only air on broadcast television in odd-numbered years). A similar phenomenon has taken root in much of Canadian sport, where the Canadian Football League left broadcast television in 2008. The National Hockey League survives on Canadian broadcast television because Rogers Sportsnet, the cable broadcaster that acquired exclusive rights to the league in 2014, offers two weekly games to CBC Television for free to allow the network to continue the long-running "Hockey Night in Canada".