The Vikings are the 21st most valuable franchise in the NFL, according to Forbes' annual rankings.

With a new stadium in the works, the Vikings are worth $1.007 billion.

The Wilf family bought the Vikings for a reported $600 million in 2005.

The Vikings have pledged $477 million, which includes a $200 million loan from the NFL, toward construction of the new stadium, which will cost $975 million.

Forbes explains how it values the franchises in this story, with an excerpt worth noting:

The NFL's 32 teams are worth, on average, $1.17 billion, 5% more than last year. The Cleveland Browns, a lousy team for years in a midsize market, sold for almost $1 billion last year. In contrast, the world's top 20 soccer teams have a mean value of $968 million. The average worth of Major League Baseball's 30 teams is $744 million. And average values for the National Basketball Association and National Hockey League, also each with 30 teams, are $509 million and $282 million, respectively.

The Dallas Cowboys are again the most valuable franchise. Here is how Forbes ranked the value of NFL teams:

1. Dallas Cowboys, $2.3 billion
2. New England Patriots, $1.8 billion
3. Washington Redskins, $1.7 billion
4. New York Giants, $1.55 billion
5. Houston Texans, $1.45 billion
6. New York Jets, $1.38 billion
7. Philadelphia Eagles, $1.314 billion
8. Chicago Bears, $1.252 billion
9. Baltimore Ravens, $1.227 billion
10. San Francisco 49ers, $1.227 billion
11. Indianapolis Colts, $1.2 billion
12. Green Bay Packers, $1.183 billion
13. Denver Broncos, $1.161 billion
14. Pittsburgh Steelers, $1.118 billion
15. Seattle Seahawks, $1.081 billion
16. Miami Dolphins, $1.074 billion
17. Tampa Bay Buccaneers, $1.067 billion
18. Carolina Panthers, $1.057 billion
19. Tennessee Titans, $1.055 billion
20. Kansas City Chiefs, $1.009 billion
21. Minnesota Vikings, $1.007 billion
22. Cleveland Browns, $1.005 billion
23. New Orleans Saints, $1.004 billion
24. Arizona Cardinals, $961 million
25. San Diego Chargers, $949 million
26. Atlanta Falcons, $933 million
27. Cincinnati Bengals, $924 million
28. Detroit Lions, $900 million
29. St. Louis Rams, $875 million
30. Buffalo Bills, $870 million
31. Jacksonville Jaguars, $840 million
32. Oakland Raiders, $825 million