Year	MJ/$2011 PPP GDP
1990	5.0577474128204
1991	5.04518316509504
1992	4.94066244294024
1993	4.88874316121034
1994	5.07346740218638
1995	5.20026176402042
1996	5.2391085467243
1997	5.4647990726644
1998	5.39055691340461
1999	5.21494201963833
2000	4.99729371580206
2001	5.12883582233552
2002	5.08590865885451
2003	4.97522470246562
2004	4.82675118795049
2005	4.67408590666942
2006	4.5955768151437
2007	4.51799360905495
2008	4.45191087951657
2009	4.69638897500628
2010	4.44680818564274
2011	4.32202154099081
2012	4.48503181647637
2013	3.88862545949255
2014	3.8841013931604
2015	3.95260802090576