Year	metric tons per capita
1990	3.356922478625803
1991	3.3557717874182305
1992	3.530230199341664
1993	3.672894328100885
1994	3.861463352401454
1995	3.8895018167145707
1996	3.9398910305370554
1997	4.039632319580962
1998	3.9706092704576137
1999	4.033001920386432
2000	4.130889675355107
2001	4.247789648473043
2002	4.319961848131169
2003	4.395211422468604
2004	4.5496815722056745
2005	4.750561251396023
2006	4.9115072352138025
2007	5.017624974051693
2008	5.195312273304561
2009	5.239349877944517
2010	5.348410970271359
2011	5.3514976701258545
2012	5.5373161715127575
2013	5.53726347657049
2014	5.603893827943663
2015	5.569143702458147
2016	5.516448951080888
2017	5.496268708347633
2018	5.376392019248399
2019	5.301363398309316
2020	5.033818297654261