Year	metric tons
1992	2359523.84
1993	2737666.09
1994	2600256.33
1995	2764526.58
1996	2766036.82
1997	3182961.07
1998	3214302.66
1999	2887906.73
2000	2310524.99
2001	2826686.21
2002	3077663.8
2003	2015938.11
2004	3067103.53
2005	3039957.2
2006	3035940
2007	2536186
2008	3726750
2009	3442567
2010	3014507.09
2011	2835283.88
2012	2694563.67
2013	3195466.11
2014	3001476.94
2015	2802791
2016	3573872
2017	2659648
2018	3243520
2019	3513320
2020	3746320
2021	3645150
2022	3023810