Measurement Differences


	Cerro Negro SCO


	2006


	API

	Total Barrels

	Barrels Loss

	Barrels Loss

	Mean NSV Loss

	Standard Deviation

	Number of Records


	15.60


	27,564,129


	-75,265


	-0.27

%


	-0.25

%


	0.31

	51

%


	2005


	Mean NSV Loss

	Standard Deviation

	Number of Records


	0.04

	0.28

	44

%

%