Year	Kg co2 per 2011 PPP of GDP
1990	0.53921
1991	0.53672
1992	0.54767
1993	0.5449
1994	0.52541
1995	0.51284
1996	0.52925
1997	0.51518
1998	0.5105
1999	0.49908
2000	0.4862
2001	0.47032
2002	0.4752
2003	0.45455
2004	0.44542
2005	0.44106
2006	0.44749
2007	0.43916
2008	0.4394
2009	0.44104
2010	0.42786
2011	0.41865
2012	0.39917
2013	0.37301
2014	0.35295