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	32910
1990	24842
1991	51911
1992	53326
1993	50287
1994	56598
1995	73774
1996	85711
1997	83274
1998	84710
1999	83867
2000	105558
2001	140923
2002	186646
2003	171802
2004	157547
2005	178146.15
2006	239245.7
2007	270928.2
2008	357892.85
2009	386860.94999999995
2010	491998.33999999997
2011	539492.68
2012	620180.72
2013	630580.41
2014	714956.71
2015	776574.9400000001
2016	724457.09
2017	719741.0499999999
2018	724110.4400000001
2019	711729.8999999999
2020	727143.7699999999
2021	815005.35
2022	843079.89