Year	metric tons
1960	470510
1961	494010
1962	540130
1963	562050
1964	626470
1965	658780
1966	716500
1967	763396
1968	748606
1969	811431
1970	915875
1971	1078569
1972	1169347
1973	1168338
1974	1197890
1975	1245962
1976	1233858
1977	1262646
1978	1271757
1979	1278195
1980	1261811
1981	1261316
1982	1254112
1983	1293379
1984	1289539
1985	1299842
1986	1405505
1987	1469374
1988	1456916
1989	1554458
1990	1624289.04
1991	1545363.1
1992	1720271
1993	1631566
1994	1600550
1995	1824648
1996	2024862
1997	2066157
1998	2070564
1999	2175978
2000	2165617
2001	2182691
2002	2114706
2003	2267949
2004	2277735.4
2005	2301081.89
2006	2320321.99
2007	2267646.01
2008	2503498.14
2009	2565295
2010	2677213.2399999998
2011	2862159.77
2012	2963970.88
2013	3106555.1200000006
2014	3207047.89
2015	3132467.91
2016	3243503.98
2017	3706566.44
2018	3642143.61
2019	3667626.7
2020	3523165.8800000004
2021	3701624.19
2022	3894655.4