Year	Kg co2 per 2011 PPP of GDP
1990	0.66628
1991	0.64613
1992	0.62729
1993	0.62421
1994	0.60352
1995	0.5958
1996	0.5739
1997	0.56391
1998	0.56572
1999	0.56991
2000	0.55636
2001	0.54467
2002	0.54921
2003	0.53233
2004	0.53737
2005	0.52705
2006	0.51211
2007	0.49729
2008	0.47741
2009	0.48749
2010	0.47174
2011	0.45194
2012	0.43977
2013	0.43708
2014	0.4296