Year	metric tons per capita
1990	3.879660676483768
1991	3.855136043669671
1992	3.5576760487602415
1993	3.359604590126248
1994	3.5519196674206763
1995	3.6088035592425554
1996	3.730959348232259
1997	4.059356289700027
1998	4.31304572109148
1999	4.575462770185865
2000	4.489206784630673
2001	4.585175052849342
2002	4.527218479668236
2003	4.672540831928344
2004	4.767881417478259
2005	4.921013667214641
2006	4.9832670795969305
2007	5.036029530952978
2008	5.938342472536541
2009	5.8427778853212855
2010	5.392940217173684
2011	5.503909454563934
2012	5.313671039149592
2013	5.1991764939591505
2014	4.620188617370528
2015	4.565435499473178
2016	4.632243431700814
2017	4.226450371972907
2018	4.541381825462659
2019	4.166143193661218
2020	3.9048711581692452