Year	metric tons
1960	251000
1961	275100
1962	379400
1963	335588
1964	368976
1965	388912
1966	393162
1967	419796
1968	495176
1969	492303
1970	573040
1971	613469
1972	620167
1973	760012
1974	715188
1975	752790
1976	660241
1977	731716
1978	754655
1979	783573
1980	808606
1981	811565
1982	831884
1983	881274
1984	960569
1985	967557
1986	957550
1987	947992
1988	830102
1989	798638
1990	640295
1991	671510
1992	670333
1993	676441
1994	701251
1995	652910
1996	693172
1997	732261
1998	710704
1999	744598
2000	839296
2001	935946
2002	1003260
2003	985412
2004	1015916
2005	1008045
2006	1050810
2007	1072225
2008	1123445
2009	1190539
2010	1197146
2011	1196780
2012	1299470.47
2013	1247652.01
2014	1337514.97
2015	1287527.09
2016	1269588.96
2017	1297727.44
2018	1307036.0899999999
2019	1334878.88
2020	1361646.13
2021	1419484.76
2022	1497393