JOINT FILING AGREEMENT
EXHIBIT A
JOINT FILING AGREEMENT
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: February 14, 2007 AMVESCAP PLC
By: /s/ ▇▇▇▇ ▇▇▇▇▇▇▇▇
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Name: ▇▇▇▇ ▇▇▇▇▇▇▇▇
Title: SVP/Global Compliance Director
AIM Advisors, Inc.
By: /s/ ▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇
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Name: ▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇
Title: Chief Compliance Officer
AIM Capital Management, Inc.
By: /s/ ▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇
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Name: ▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇
Title: Chief Compliance Officer
AIM Funds Management, Inc.
By: /s/ ▇▇▇▇▇ ▇▇▇▇▇▇
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Name: ▇▇▇▇▇ ▇▇▇▇▇▇
Title: Vice President, Compliance &
Chief Compliance Officer
AIM Private Asset Management, Inc.
By: /s/ ▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇
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Name: ▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇
Title: Chief Compliance Officer
AMVESCAP National Trust Company
By: /s/ ▇▇▇▇▇ ▇▇▇▇▇
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Name: ▇▇▇▇▇ ▇▇▇▇▇
Title: General Counsel
Atlantic Trust Company, N.A.
By: /s/ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇
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Name: ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇
Title: Ghief Compliance Officer
INVESCO Hong Kong Limited
By: /s/ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇
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Name: ▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇
Title: Reg. Head of Legal AP
INVESCO Asset Management Deutschland
GmbH
By: /s/ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇
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Name: ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇
Title: Head of Legal CE
INVESCO Asset Management Limited
By: /s/ ▇▇▇▇ ▇▇▇▇▇▇
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Name: ▇▇▇▇ ▇▇▇▇▇▇
Title: Director of European Compliance
INVESCO Asset Management S.A.
By: /s/ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇
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Name: ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇
Title: Managing Director
INVESCO Asset Management Osterreich GmbH
By: /s/ ▇▇▇▇▇▇ ▇▇▇▇▇
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Name: ▇▇▇▇▇▇ ▇▇▇▇▇
Title: Managing Director
INVESCO Global Asset Management (N.A.),
Inc.
By: /s/ ▇▇▇▇▇▇▇ ▇▇▇▇▇
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Name: ▇▇▇▇▇▇▇ ▇▇▇▇▇
Title: General Counsel
INVESCO GT Management Company S.A.
By: /s/ ▇▇▇▇ ▇▇▇▇▇▇
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Name: ▇▇▇▇ ▇▇▇▇▇▇
Title: Director of European Compliance
INVESCO Institutional (N.A.), Inc.
By: /s/ ▇▇▇▇▇▇▇ ▇▇▇▇▇
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Name: ▇▇▇▇▇▇▇ ▇▇▇▇▇
Title: General Counsel
INVESCO Management S.A.
By: /s/ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇
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Name: ▇▇▇▇▇ ▇▇▇▇▇▇▇▇
Title: Head of Investment Operations
INVESCO Maximum Income Management S.A.
By: /s/ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇
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Name: ▇▇▇▇▇ ▇▇▇▇▇▇▇▇
Title: Head of Investment Operations
INVESCO Private Capital, Inc.
By: /s/ ▇▇▇▇▇▇▇ ▇▇▇▇▇
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Name: ▇▇▇▇▇▇▇ ▇▇▇▇▇
Title: General Counsel
INVESCO Senior Secured Management, Inc.
By: /s/ ▇▇▇▇▇▇▇ ▇▇▇▇▇
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Name: ▇▇▇▇▇▇▇ ▇▇▇▇▇
Title: General Counsel
INVESCO Taiwan Limited
By: /s/ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇
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Name: ▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇
Title: Reg. Head of Legal, AP
INVESCO Asset Management (Japan) Limited
By: /s/ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇
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Name: ▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇
Title: Reg. Head of Legal, AP
INVESCO Asset Management Ireland Limited
By: /s/ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇
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Name: ▇▇▇▇▇ ▇▇▇▇▇▇▇▇
Title: Head of Investment Operations
INVESCO Kapitalanlagegesellschaft GmbH
By: /s/ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇
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Name: ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇
Title: Head of Legal CE
PowerShares Capital Management LLC
By: /s/ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇
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Name: ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇
Title: General Counsel & COO
▇▇▇▇▇ ▇▇▇ Investment Counsel, Inc.
By: /s/ ▇▇▇▇ ▇▇▇▇▇▇▇▇
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Name: ▇▇▇▇ ▇▇▇▇▇▇▇▇
Title: General Counsel