Year	kg per 2015 US$ of GDP
1990	2.115444864093785
1991	2.0508655447445436
1992	1.885928978786956
1993	1.81162849322815
1994	1.6767554789208552
1995	1.6864664866252195
1996	1.5252330578723627
1997	1.4251877885365478
1998	1.3645817255745503
1999	1.2351156742026543
2000	1.2080828146909517
2001	1.1759597689311467
2002	1.1590879041949356
2003	1.2276795132528826
2004	1.288494391760621
2005	1.317626174261065
2006	1.291917592613271
2007	1.2286013964541505
2008	1.1535421036527689
2009	1.1305182926188722
2010	1.1218952829438384
2011	1.1216784230237788
2012	1.068804757031861
2013	1.037374719470104
2014	0.9697226961073097
2015	0.8913091781760435
2016	0.8343164393242836
2017	0.7981859703562607
2018	0.7831405639966197
2019	0.7528361570029696
2020	0.7487942280064821