Year	kg per 2015 US$ of GDP
1990	1.5668736086301358
1991	1.5362962602088988
1992	1.4443167147614127
1993	1.41323003037042
1994	1.335366084491482
1995	1.3530632595545005
1996	1.248977919664798
1997	1.1981201722471508
1998	1.189128205760412
1999	1.105689312278506
2000	1.083540968835733
2001	1.06793760089626
2002	1.0557221133678953
2003	1.1102632492190543
2004	1.1594737688777126
2005	1.183097026730988
2006	1.1652636933958174
2007	1.1186718693334432
2008	1.0601484148703617
2009	1.0413300038347404
2010	1.0374171486355648
2011	1.040115270215012
2012	0.9938394212794853
2013	0.9641810425463173
2014	0.9108279654242843
2015	0.8446954870551495
2016	0.7953303959769787
2017	0.7662020750393191
2018	0.7568482992749804
2019	0.7343061249998892
2020	0.7324771617051159