Year	metric tons
1992	598084
1993	810703
1994	510391
1995	513469
1996	629158
1997	650546
1998	576133
1999	401653
2000	696647
2001	558480
2002	524652
2003	505726
2004	608148
2005	760073
2006	619292
2007	879475
2008	863800
2009	873466
2010	678372
2011	771725
2012	991200
2013	975500
2014	1221600
2015	1535300
2016	934051
2017	1311893
2018	919830
2019	1624580
2020	1632790
2021	1285750
2022	1528560