Year	kg per 2015 US$ of GDP
1990	3.389500610340518
1991	3.3065348480320007
1992	3.335718959677984
1993	3.135348621719392
1994	3.0120042539687923
1995	2.9904418154051178
1996	2.956832562439766
1997	2.6799898003945817
1998	2.3961359977375825
1999	2.2264379870430893
2000	2.0281695936930726
2001	1.8910514705758095
2002	1.8013634781247414
2003	1.7079734362554537
2004	1.6266716391709568
2005	1.5058699448193587
2006	1.4254509965111954
2007	1.2798148678326136
2008	1.2202033757255217
2009	1.1560138668146154
2010	1.1524045964838547
2011	1.038091078270863
2012	1.0455904311656408
2013	1.0378520745236888
2014	1.012414746838282
2015	0.9719494773517963
2016	1.0031340998883496
2017	0.9968973244430371
2018	1.0184272308672504
2019	0.9769713468711925
2020	0.9344848135875393