Year	Kg co2 per 2011 PPP of GDP
1990	0.52136
1991	0.52147
1992	0.51283
1993	0.51124
1994	0.49782
1995	0.48831
1996	0.48137
1997	0.47093
1998	0.45358
1999	0.44159
2000	0.4388
2001	0.42709
2002	0.42301
2003	0.41397
2004	0.40452
2005	0.39371
2006	0.37736
2007	0.37674
2008	0.36642
2009	0.35335
2010	0.35326
2011	0.34088
2012	0.32273
2013	0.31987
2014	0.3176