Measurement Differences


	Sirtica


	2006


	API

	Total Barrels

	Barrels Loss

	Barrels Loss

	Mean NSV Loss

	Standard Deviation

	Number of Records


	40.29


	26,970,959


	-30,930


	-0.11

%


	-0.12

%


	0.17

	44

%


	2005


	Mean NSV Loss

	Standard Deviation

	Number of Records


	-0.18

	0.24

	31

%

%