Year	metric tons
1992	1978255
1993	3218589
1994	1627891
1995	2610779
1996	1976169
1997	3486746
1998	2428062
1999	2141579
2000	1905097
2001	2550044
2002	2539059
2003	2000680.18
2004	2942574
2005	2771711
2006	2222357
2007	1825348.29
2008	3132303
2009	2149173
2010	2386009
2011	2466400
2012	1190061
2013	2654337
2014	2886891
2015	2183323
2016	2954175
2017	3285836
2018	3421119
2019	3498682
2020	1478349
2021	4647534.73
2022	1758120.71