Year	metric tons per capita
1990	4.25786751198568
1991	3.1445576497615066
1992	3.2849208600516895
1993	3.377160081496145
1994	3.1953833428202434
1995	3.3447618305508837
1996	3.347394185377226
1997	3.7640355287414105
1998	4.088029151823588
1999	4.102648652206257
2000	4.036074553600003
2001	4.464557746900788
2002	4.7131287576932035
2003	5.02112399988939
2004	4.900037169539562
2005	4.975470662819928
2006	5.009859297696977
2007	5.306461368418342
2008	5.04124992313859
2009	4.7166193477115135
2010	4.529770846996119
2011	4.445054947622097
2012	4.077976210282321
2013	3.997143588265026
2014	3.8307951440983827
2015	3.949539490399191
2016	4.0429777194000796
2017	4.2205768364936525
2018	4.02006632837905
2019	4.064519477631527
2020	3.8607053917305714