Year	metric tons
1960	762244
1961	824276
1962	919026
1963	1028537
1964	1031121
1965	1068479
1966	1081491
1967	1168807
1968	1292881
1969	1221799
1970	1457047
1971	1543315
1972	1712256
1973	1985036
1974	2185426
1975	2209105
1976	2308298
1977	2471003.5
1978	2485896
1979	2517036
1980	2727258
1981	3010547
1982	3008262
1983	3227407.5
1984	3403202.45
1985	3588149.66
1986	3963468.09
1987	3920600.23
1988	4212357.96
1989	4129378.06
1990	4195014.04
1991	4263043.6
1992	4450894.99
1993	4596583.02
1994	4885358
1995	4986198.2
1996	5023640.13
1997	5344243.7
1998	5219878.1
1999	5369666.59
2000	5321275.75
2001	5678948.72
2002	5881766
2003	6015674.02
2004	6211600
2005	6215549.29
2006	6622595.54
2007	6937533.130000001
2008	6836122.38
2009	6967746.779999999
2010	6809912.539999999
2011	6975621.779999999
2012	7476947.45
2013	7333235.039999999
2014	7674311.73
2015	7765870.809999999
2016	7907657.239999999
2017	8590093.13
2018	8691693.4
2019	9001483.349999998
2020	9025354.120000001
2021	9360955.129999997
2022	6702476.93