Year	Kg co2 per 2011 PPP of GDP
1990	0.5003
1991	0.50129
1992	0.51344
1993	0.50538
1994	0.49588
1995	0.49435
1996	0.49877
1997	0.49413
1998	0.48646
1999	0.47067
2000	0.46397
2001	0.45039
2002	0.43011
2003	0.44997
2004	0.43578
2005	0.42626
2006	0.40523
2007	0.40473
2008	0.40554
2009	0.3998
2010	0.38632
2011	0.37627
2012	0.35628
2013	0.34748
2014	0.35092