Year	metric tons per capita
1990	4.020789461449341
1991	3.9832659385068907
1992	3.910233783022467
1993	3.8749092461006263
1994	3.841951759406391
1995	3.8937998359371067
1996	3.9195077531425233
1997	3.9351993573442936
1998	3.9073795715877195
1999	3.8813607687524243
2000	3.951581136424599
2001	3.9580002964628296
2002	3.961380097639685
2003	4.089998178976299
2004	4.22372281869708
2005	4.329732723692373
2006	4.417099843393016
2007	4.528264285755107
2008	4.5038081525476255
2009	4.391485439215701
2010	4.604929378764655
2011	4.68950582813015
2012	4.685347770484417
2013	4.719564350749026
2014	4.6822391143634565
2015	4.601434541728897
2016	4.5582501378588685
2017	4.577977150798022
2018	4.641656477749261
2019	4.582010382560679
2020	4.291684044605448