Year	metric tons
1992	1080400
1993	962300
1994	847400
1995	671360
1996	841400
1997	1242059
1998	1326660
1999	1368792
2000	930230
2001	1137981
2002	1307700
2003	793364
2004	1438704
2005	1349772
2006	1340995
2007	1000576
2008	1374701
2009	1390724
2010	1104907
2011	1118257
2012	905975
2013	1222498
2014	1082655
2015	1137236
2016	1657556
2017	1167004.74
2018	1743762
2019	1666131
2020	1944178
2021	1400676
2022	1431169