Measurement Differences


	Alaskan North Slope


	2006


	API

	Total Barrels

	Barrels Loss

	Barrels Loss

	Mean NSV Loss

	Standard Deviation

	Number of Records


	32.60


	139,102,925


	-91,548


	-0.07

%


	-0.06

%


	0.20

	158

%


	2005


	Mean NSV Loss

	Standard Deviation

	Number of Records


	-0.05

	0.21

	336

%

%