Year	kg per 2015 US$ of GDP
1990	1.1800704792345798
1991	1.187810237946195
1992	1.148059949023726
1993	1.0956873073174949
1994	1.0880813953031707
1995	1.0444384638873054
1996	1.0613729199713047
1997	1.0840810440694935
1998	1.072174645157451
1999	1.0674707863370176
2000	1.0001053701554437
2001	1.0083892351076642
2002	1.0120733966914524
2003	1.053719166179905
2004	1.0495902610006476
2005	1.0453175976444269
2006	1.0671240937739566
2007	1.0790161452044755
2008	1.070201968068758
2009	1.0705192509235217
2010	1.129732684982075
2011	1.1569932576342876
2012	1.1649349046021766
2013	1.1879834733015542
2014	1.2044287226469215
2015	1.1600539332057074
2016	1.13353287663071
2017	1.0947565324958575
2018	1.0615976222154655
2019	1.0177119414922704
2020	1.0267169758223924