Year	Kg co2 per 2011 PPP of GDP
1990	0.49519
1991	0.47515
1992	0.48653
1993	0.5157
1994	0.50462
1995	0.50168
1996	0.50236
1997	0.50511
1998	0.45333
1999	0.44638
2000	0.45869
2001	0.44141
2002	0.42497
2003	0.41337
2004	0.40764
2005	0.37651
2006	0.36396
2007	0.36345
2008	0.36195
2009	0.3603
2010	0.37679
2011	0.37795
2012	0.36608
2013	0.36097
2014	0.34615