Year	metric tons
1992	1143400
1993	1230700
1994	896100
1995	689040
1996	960800
1997	1035200
1998	958900
1999	783400
2000	923624
2001	928000
2002	1028500
2003	932400
2004	1059500
2005	1314300
2006	1158700
2007	1535200
2008	1689400
2009	1663100
2010	1435500
2011	1412000
2012	2124500
2013	1948700
2014	2227200
2015	3021500
2016	2703200
2017	2692500
2018	2057300
2019	3163200
2020	3497100
2021	2994600
2022	3243700