EXHIBIT A
JOINT FILING AGREEMENT
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In accordance with Rule 13d-1(k)(l) under the Securities Exchange Act of 1934,
as amended, the undersigned hereby agree to the joint filing of the attached
Schedule 13G, and any and all amendments thereto, and expressly authorize
AMVESCAP PLC, as the ultimate parent company of each of its undersigned
subsidiaries, to file such Schedule 13G, and any and all amendments thereto, on
behalf of each of them.
Dated: October 11, 2005 AMVESCAP PLC
By: /s/ Xxxxx Xxxx
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Name: Xxxxx Xxxx
Title: General Counsel
AIM Funds Management, Inc.
By: /s/ Xxxxx Xxxxxx
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Name: Xxxxx Xxxxxx
Title: Vice President, Compliance
AIM Advisors, Inc.
By: /s/ Xxxx X. Xxxxxxxx
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Name: Xxxx X. Xxxxxxxx
Title: Advisory Compliance Director
