Current agreement:

• APRIL 1, 2010 – MARCH 31, 2012

Previous agreements:

• APRIL 1, 2007 – MARCH 31, 2010
• APRIL 1, 2004 – MARCH 31, 2007
• APRIL 1, 2001 – MARCH 31, 2004
  • Common agreement: March 30, 2001