"Figure 17.3: Estimates of discovered gas reserves","" "UK 1995 to 2014","" "","" "Notes","" "Unit","Billion cubic meters" "","" "","Proven","Probable","Possible" "1995","700","780","435" "1996","760","660","540" "1997","765","620","600" "1998","755","585","455" "1999","760","500","490" "2000","735","460","430" "2001","655","445","395" "2002","630","370","330" "2003","590","315","336" "2004","531","296","343" "2005","481","247","278" "2006","412","272","283" "2007","343","304","293" "2008","292","309","306" "2009","256","308","276" "2010","253","267","261" "2011","246","246","216" "2012","244","217","238" "2013","241","211","198" "2014","205","201","187"