Year	metric tons
1992	368753
1993	421684
1994	528787
1995	510936.97
1996	489041.76
1997	545220
1998	558625
1999	479997
2000	496964
2001	499565
2002	614326
2003	402239.86
2004	586833.17
2005	579486.28
2006	496874.72
2007	535319.15
2008	583180.59
2009	536505.02
2010	572622.46
2011	611689.89
2012	580413.33
2013	461461.76
2014	653111.28
2015	628407.59
2016	642479.23
2017	551216.16
2018	597050
2019	642250
2020	749700
2021	700550
2022	576200