Year	kg per 2015 US$ of GDP
1990	2.367758681361562
1991	2.3743027405960757
1992	2.174672914338961
1993	1.8380319722898952
1994	1.9047693825828536
1995	1.608939809348162
1996	1.6244029101158328
1997	1.4680021287661709
1998	1.2942286457541519
1999	1.2253413992729074
2000	1.0731869412923734
2001	1.0326908155934518
2002	0.93947458361281
2003	0.9844686835300278
2004	0.9257861325951813
2005	0.8479214203736822
2006	0.7394982883307688
2007	0.8444373912354621
2008	0.7872488098388974
2009	0.7410280313349923
2010	0.9526134227772413
2011	0.8882149043218099
2012	0.7900503248758047
2013	0.8638324546396594
2014	0.7828894884996486
2015	0.6280743272495086
2016	0.6736601047393752
2017	0.6714563248952562
2018	0.6062192465653978
2019	0.3730070440556354
2020	0.2657104005611318