Year	metric tons
1960	261934
1961	279060
1962	325424
1963	333898
1964	359826
1965	375837
1966	355332
1967	359314
1968	405595
1969	421634
1970	472162
1971	462284
1972	559283
1973	556672
1974	586590
1975	639914
1976	620374
1977	693358
1978	732189
1979	707372
1980	730339
1981	797569
1982	862011
1983	887447
1984	903543
1985	990333
1986	1022837
1987	1049738
1988	1119002
1989	1143219
1990	1209516
1991	1225701
1992	1395390
1993	1405406
1994	1519927
1995	1629416
1996	1713454
1997	1805809
1998	1986332
1999	2143310
2000	2142174
2001	2165600
2002	2110311.76
2003	2247610.1
2004	2280585.4
2005	2267183
2006	2339890.25
2007	2527481.2
2008	2500370.52
2009	2698892.6300000004
2010	2714637.65
2011	2865303.3700000006
2012	3077092.55
2013	3035438.62
2014	3214533.7800000003
2015	3261825.6700000004
2016	3296926.849999999
2017	3392600.02
2018	3489717.590000001
2019	3747023.5
2020	3830340.4700000007
2021	4208555.25
2022	4011815.5400000005