Year	kg per 2015 US$ of GDP
1990	1.9733332521192706
1991	1.9048911361050187
1992	2.7207350752930615
1993	3.0854154150093143
1994	2.23461235994148
1995	1.705372616271427
1996	1.1933723151575226
1997	0.9364859395762809
1998	0.8213291660875485
1999	0.7235306639440392
2000	0.7498258281766147
2001	0.5270710975566859
2002	0.4204428846798363
2003	0.4040230553543742
2004	0.40801641909129294
2005	0.46833460912631064
2006	0.47422927790785735
2007	0.5041645270525097
2008	0.4233234223835698
2009	0.5106869691814079
2010	0.45483624987835697
2011	0.5163924569374779
2012	0.5343816310316594
2013	0.5670140199302873
2014	0.587501138774862
2015	0.617414993481533
2016	0.623123304464749
2017	0.5981939454991512
2018	0.5536483964803741
2019	0.5699153307871883
2020	0.5911888844129268