Form: SC 13G/A

Statement of Beneficial Ownership by Certain Investors

February 14, 2000

JOINT FILING AGREEMENT

Published on February 14, 2000


EXHIBIT I



JOINT FILING AGREEMENT




Each of the undersigned hereby agrees that the Schedule 13G filed
herewith is filed jointly, pursuant to Rule 13d-1(f)(1) of the Securities
Exchange Act of 1934, as amended on behalf of each of them.


Dated: February 10, 2000



AXA Financial, Inc.



BY: /s/ Alvin H. Fenichel
-------------------------
Alvin H. Fenichel
Senior Vice President
and Controller



AXA Assurances I.A.R.D. Mutuelle; AXA Assurances Vie Mutuelle; AXA
Conseil Vie Assurance Mutuelle; AXA Courtage Assurance Mutuelle, as a
group, and AXA

Signed on behalf of each of the above entities



BY: /s/ Alvin H. Fenichel
Alvin H. Fenichel
Attorney-in-Fact
(Executed pursuant to Powers of Attorney)