Year	MJ/$2011 PPP GDP
1990	3.98089540956278
1991	3.94061207581635
1992	3.87197030647725
1993	3.90186659790351
1994	3.61031132076973
1995	3.66903321021947
1996	3.70922123545861
1997	3.66201640069371
1998	3.77164630474912
1999	3.63399638445652
2000	3.29080304639663
2001	3.56946868761039
2002	3.59683614171353
2003	3.61839296909718
2004	3.75747882802877
2005	4.19067621059497
2006	4.14438007053593
2007	4.14541380253581
2008	4.01876297704385
2009	3.92791780698081
2010	3.66470829263456
2011	3.77736476114315
2012	3.79971890055693
2013	3.56725879529674
2014	3.71434452337684
2015	3.51107011031528