| Date - Field | UnitedStates - Location |
2008 January Location | North America, bordering both the North Atlantic Ocean and the North Pacific Ocean, between Canada and Mexico |
2007 January Location | North America, bordering both the North Atlantic Ocean and the North Pacific Ocean, between Canada and Mexico |
2006 January Location | North America, bordering both the North Atlantic Ocean and the North Pacific Ocean, between Canada and Mexico |
2005 January Location | North America, bordering both the North Atlantic Ocean and the North Pacific Ocean, between Canada and Mexico |
2004 January Location | North America, bordering both the North Atlantic Ocean and the North Pacific Ocean, between Canada and Mexico |
2003 January Location | North America, bordering both the North Atlantic Ocean and the North Pacific Ocean, between Canada and Mexico |
2002 January Location | North America, bordering both the North Atlantic Ocean and the North Pacific Ocean, between Canada and Mexico |
2001 January Location | North America, bordering both the North Atlantic Ocean and the North Pacific Ocean, between Canada and Mexico |
2000 January Location | North America, bordering both the North Atlantic Ocean and the North Pacific Ocean, between Canada and Mexico |