"Figure 2: Estimates of discovered oil reserves, 1995-2011","" "United Kingdom","" "","" "Notes","1. Total discovered reserves are the sum of proven, probable and possible reserves" "Unit","Billion tonnes" "","" "","Proven","Probable","Possible","Total discovered reserves1" "1995","0.61","0.77","0.52","1.89" "1996","0.67","0.69","0.67","2.03" "1997","0.69","0.70","0.63","2.02" "1998","0.69","0.58","0.54","1.80" "1999","0.67","0.46","0.55","1.67" "2000","0.63","0.38","0.48","1.49" "2001","0.61","0.35","0.48","1.43" "2002","0.60","0.33","0.43","1.35" "2003","0.57","0.29","0.41","1.27" "2004","0.53","0.28","0.51","1.33" "2005","0.52","0.30","0.45","1.27" "2006","0.48","0.30","0.48","1.25" "2007","0.45","0.33","0.40","1.18" "2008","0.41","0.36","0.36","1.13" "2009","0.38","0.39","0.34","1.11" "2010","0.37","0.38","0.34","1.09" "2011","0.41","0.37","0.32","1.11"