Year	metric tons
1960	231307
1961	232016
1962	251017
1963	268323
1964	304668
1965	332837
1966	384912
1967	394645
1968	402914
1969	421059
1970	470390
1971	564877
1972	600822
1973	631629
1974	607994
1975	607568
1976	657420
1977	692338
1978	741116
1979	765887
1980	751957
1981	805442
1982	826530
1983	885015
1984	899991
1985	933399
1986	991052.4
1987	1013010.5
1988	1063742
1989	1103721.3
1990	1212804.81
1991	1187259.48
1992	1243122.1
1993	1267887.72
1994	1252478.31
1995	1338235.4
1996	1318987.8
1997	1429728.09
1998	1590589.74
1999	1672199.7800000003
2000	1678661.29
2001	1658136.2000000002
2002	1709322.74
2003	1660590.36
2004	1805458.6
2005	1853157.96
2006	2026309.94
2007	1942172.54
2008	2082798.55
2009	2115778.1100000003
2010	2211948.35
2011	2331348.89
2012	2417264.5900000003
2013	2555990.6100000003
2014	2714906.29
2015	2630223.85
2016	2736762.5599999996
2017	3016577.5799999996
2018	2932767.1500000004
2019	2822105.83
2020	2700235.22
2021	2729610.5599999996
2022	2769982.48