Year	metric tons
1960	49317
1961	50679
1962	52084
1963	53558
1964	55078
1965	58352
1966	58298
1967	60030
1968	60094
1969	63761
1970	65834
1971	69434
1972	70237
1973	72603
1974	73303
1975	76071
1976	80427
1977	81224
1978	87409
1979	92754
1980	97364
1981	104197
1982	110377
1983	117367
1984	128629
1985	140880
1986	165857
1987	188702
1988	201768
1989	215125
1990	242296
1991	285062
1992	316124
1993	346429
1994	395890
1995	477331
1996	556875
1997	674313
1998	766805
1999	803981
2000	906327
2001	1030594
2002	1217906
2003	1350974
2004	1544347.2
2005	1611471.95
2006	1745148.8
2007	1846599.3
2008	2007190.5899999999
2009	2211946.31
2010	2602121.1
2011	2807709.47
2012	3133532.7399999998
2013	3302874.05
2014	3503454.91
2015	3732419.54
2016	3879398.79
2017	4087637.3299999996
2018	4290519.93
2019	4392742.55
2020	4680333.96
2021	4786727.79
2022	4755083.26