EXHIBIT 12.1

	YEAR ENDED
(in thousands of U.S. dollars	Dec. 31, 2006			Dec. 31, 2005		Dec. 31, 2004		Dec. 31, 2003		Dec. 31, 2002
Fixed charges:
Interest expense	$	10,998	(1)	$	10,927	$	11,362	$	13,134	$	13,347
Portion of rent expense representative of interest		2900			2,900		2,600		2,467		1,867
Total fixed charges	$	13,898		$	13,827	$	13,962	$	15,601	$	15,214
Earnings:
Income from continuing operations before tax	$	83,538		$	146,225	$	156,805	$	162,833	$	149,197
Fixed charges per above		13,898			13,827		13,962		15,601		15,214
Total earnings	$	97,436		$	160,052	$	170,767	$	178,434	$	164,411
Ratio of earnings to fixed charges		7.01			11.58		12.23		11.44		10.81

(1) Excludes $13,751 of interest expense for premiums and losses on swap and swaption contracts. These contracts are unrelated to our indebtedness.