Years ended December 31 (millions of Canadian dollars)		North America	North Sea	Southeast Asia	Sudan	Algeria	Trinidad	Other	Total
2004	Net oil and gas revenue derived from proved reserves1	2,304	2,038	729	-	156	-	-	5,227
	Less:
	Production costs	392	662	98	-	17	-	-	1,169
	Transportation	75	66	42	-	9	-	-	192
	Exploration and dry hole expense	251	138	45	-	4	33	78	549
	Depreciation, depletion and amortization	729	689	174	-	30	-	-	1,662
	Tax expense(recovery)	219	288	152	-	36	(11)	(27)	657
	Results of operations	638	195	218	-	60	(22)	(51)	1,038
2003	Net oil and gas revenue derived from proved reserves1	2,148	1,762	436	112	43	-	-	4,501
	Less:
	Production costs	367	528	87	18	12	-	-	1,012
	Transportation	78	63	36	-	4	-	-	181
	Exploration and dry hole expense	222	90	26	5	1	34	86	464
	Depreciation, depletion and amortization	647	635	95	-	17	-	-	1,394
	Tax expense (recovery)	328	237	77	30	3	(12)	(31)	632
	Results of operations	506	209	115	59	6	(22)	(55)	818
2002	Net oil and gas revenue derived from proved reserves1	1,712	1,926	393	500	-	-	-	4,531
	Less:
	Production costs	339	522	85	84	-	-	-	1,030
	Transportation	78	78	38	-	-	-	-	194
	Exploration and dry hole expense	194	29	23	19	5	46	43	359
	Depreciation, depletion and amortization	583	701	87	92	-	-	-	1,463
	Tax expense (recovery)	205	430	75	85	(2)	(22)	(18)	753
	Results of operations	313	166	85	220	(3)	(24)	(25)	732

1. Net oil and gas revenue derived from proved reserves is net of applicable royalties and reflects hedging activities.