Year	metric tons
1960	681151
1961	733720
1962	839377
1963	944584
1964	941994
1965	982979
1966	991333
1967	1080554
1968	1201818
1969	1128482
1970	1344997
1971	1420215
1972	1574358
1973	1823448
1974	2014857
1975	2024567
1976	2110155
1977	2269968
1978	2265882
1979	2283166
1980	2503604
1981	2750312
1982	2728605
1983	2931416
1984	3074136.45
1985	3252660.45
1986	3606114.99
1987	3516347.23
1988	3775008.96
1989	3721396.06
1990	3671203.04
1991	3751387.6
1992	4042918.99
1993	4152969.85
1994	4365746.04
1995	4446895.5
1996	4378448.75
1997	4635659.51
1998	4536480.1
1999	4720195.77
2000	4542528.09
2001	4596025.7
2002	4782875.91
2003	4885077.0600000005
2004	5042698.49
2005	5039326.96
2006	5353980.140000001
2007	5696030.94
2008	5511653.29
2009	5660001.699999999
2010	5663393.32
2011	5555843.01
2012	5911249.409999999
2013	5798775.470000001
2014	5941531.56
2015	6223364.33
2016	6407777.82
2017	6858399.930000001
2018	6887805.31
2019	7029337.739999999
2020	6943162.659999999
2021	7279582.579999999
2022	4527564.150000001