Year	MJ/$2011 PPP GDP
1990	6.78309637147529
1991	6.18590554801454
1992	5.91849055798939
1993	7.30592796564293
1994	6.79270797776052
1995	6.84570109773406
1996	6.87644989102767
1997	6.69687748480077
1998	6.42565954014974
1999	6.6517038571186
2000	6.89342907615347
2001	6.28294911135375
2002	5.89425114240318
2003	5.49057492801994
2004	4.17656782498008
2005	3.64584475928064
2006	3.68171645334458
2007	3.66166489677764
2008	3.64477880208472
2009	3.53828162478454
2010	3.17670560827005
2011	3.22846322312456
2012	3.01400800317288
2013	2.92560674384005
2014	2.78717817429891
2015	2.78131878010528