Year	metric tons
1960	2385
1961	2583
1962	2721
1963	2927
1964	3160
1965	3303
1966	3458
1967	3635
1968	3771
1969	3952
1970	4243
1971	4435
1972	4697
1973	4967
1974	5112
1975	5349
1976	5649
1977	6009
1978	6333
1979	6636
1980	7048
1981	7411
1982	7914
1983	8549
1984	9417
1985	11100
1986	9744
1987	11080
1988	16596
1989	32917
1990	24857
1991	51923
1992	53376
1993	50387
1994	56762
1995	73969
1996	85989
1997	83858
1998	85359
1999	84094
2000	105983
2001	141205
2002	186880
2003	172886
2004	158722
2005	178918.15
2006	239949.7
2007	271296.2
2008	358181.85
2009	386860.94999999995
2010	491998.33999999997
2011	539492.6799999999
2012	620180.72
2013	630580.41
2014	714956.8099999999
2015	776575.04
2016	724457.09
2017	719741.15
2018	724110.4400000001
2019	711729.8999999999
2020	727143.77
2021	815005.35
2022	843079.89