Year	Kg co2 per 2011 PPP of GDP
1990	0.71366
1991	0.61321
1992	0.52755
1993	0.62776
1994	0.63564
1995	0.61281
1996	0.62052
1997	0.66732
1998	0.67673
1999	0.63526
2000	0.62415
2001	0.45494
2002	0.49491
2003	0.48969
2004	0.48668
2005	0.50002
2006	0.46041
2007	0.60614
2008	0.63262
2009	0.58481
2010	0.58135
2011	0.55804
2012	0.50085
2013	0.55774
2014	0.53493