Year	Kg co2 per 2011 PPP of GDP
1990	0.46501
1991	0.43012
1992	0.45376
1993	0.42785
1994	0.45914
1995	0.42995
1996	0.44076
1997	0.43359
1998	0.42463
1999	0.41135
2000	0.42003
2001	0.41174
2002	0.41072
2003	0.40793
2004	0.41383
2005	0.41883
2006	0.38862
2007	0.37478
2008	0.33862
2009	0.3292
2010	0.31131
2011	0.31045
2012	0.34117
2013	0.33104
2014	0.34823