Year	kg per 2015 US$ of GDP
1990	1.1937425791675211
1991	1.0341461387327937
1992	1.1497083319198662
1993	1.0845133451901345
1994	1.1126776857952954
1995	1.0837213764007627
1996	1.0885488728621955
1997	1.0753445575123162
1998	1.1025817005486298
1999	1.0545290766202908
2000	1.0290380818882683
2001	1.0362692243529823
2002	1.0537977083317807
2003	1.0329753861680533
2004	0.9646648258955282
2005	1.042928509482892
2006	1.064392954579577
2007	1.0054115145385463
2008	1.0187739201671868
2009	0.991729601655421
2010	0.9985474196083591
2011	0.9810833709768891
2012	0.987868167897981
2013	0.9950002890122243
2014	1.0007664677856756
2015	0.9796487150654686
2016	0.9408230536710879
2017	0.9126729482387713
2018	0.9018798198420708
2019	0.9434929195124268
2020	0.9745445419064136