Year	metric tons per capita
1990	6.451697925357667
1991	6.715727609706973
1992	6.647298964825717
1993	6.262660766056067
1994	6.090112735646384
1995	6.169767240043479
1996	6.222699859301314
1997	6.0303098954902215
1998	6.223248069866657
1999	6.232944582376994
2000	6.083975362772732
2001	6.245589468335044
2002	5.9814382176032606
2003	6.1097552650558296
2004	6.128037620312263
2005	6.165119135578783
2006	6.076924248663872
2007	5.766193266506133
2008	5.879237807568967
2009	5.639146825389139
2010	5.7774218204965715
2011	5.206044994197714
2012	5.316661124908886
2013	5.381300293002673
2014	4.859568409880556
2015	4.719745349051169
2016	4.737238601857467
2017	4.578766280478571
2018	4.402143727356554
2019	4.358609864634158
2020	4.042072814753408