Year	metric tons
1960	2385
1961	2583
1962	2721
1963	2927
1964	3160
1965	3303
1966	3454
1967	3625
1968	3751
1969	3968
1970	4219
1971	4473
1972	5113
1973	5847
1974	6750
1975	7447
1976	8270
1977	8866
1978	9384
1979	9825
1980	10401
1981	10895
1982	11491
1983	12146
1984	13005
1985	14470
1986	13023
1987	14678
1988	19634
1989	33327
1990	22247
1991	48272
1992	53267
1993	49655
1994	55532
1995	71926
1996	84239
1997	81749
1998	84918
1999	77011
2000	96556
2001	131497
2002	175866
2003	162761
2004	161015
2005	186278
2006	242879
2007	275275.5
2008	361250
2009	388791.05000000005
2010	493304.89999999997
2011	517419.27
2012	597458.49
2013	587835.62
2014	676070.15
2015	730802.3099999999
2016	673753.45
2017	670671.22
2018	646576.02
2019	651033.41
2020	651160.1
2021	729558.76
2022	708578.2999999999