Year	Kg co2 per 2011 PPP of GDP
1990	0.40548
1991	0.42654
1992	0.4295
1993	0.42445
1994	0.42051
1995	0.41484
1996	0.41936
1997	0.41919
1998	0.40275
1999	0.39355
2000	0.39273
2001	0.37803
2002	0.36876
2003	0.35659
2004	0.34686
2005	0.33615
2006	0.32807
2007	0.3226
2008	0.34598
2009	0.35356
2010	0.31716
2011	0.31853
2012	0.33104
2013	0.31367
2014	0.32125