Year	metric tons
1960	17100
1961	18000
1962	19500
1963	19900
1964	20100
1965	20000
1966	20500
1967	20500
1968	22000
1969	22300
1970	22200
1971	22200
1972	22200
1973	22600
1974	22600
1975	22600
1976	24700
1977	23570
1978	26610
1979	28520
1980	26060
1981	28530
1982	29710
1983	29500
1984	29790
1985	26320
1986	23983
1987	27243
1988	29245
1989	30300
1990	31734
1991	33316
1992	35223
1993	40214
1994	44213
1995	45003
1996	46009.6
1997	48010
1998	50513
1999	50513.5
2000	54010
2001	59007.5
2002	58607.5
2003	60607.5
2004	64607.5
2005	60607.5
2006	58607.5
2007	67466.5
2008	70402.5
2009	73698
2010	73358
2011	73008
2012	41508
2013	40208
2014	39508
2015	40008
2016	41502
2017	47390
2018	51041
2019	49770
2020	46660
2021	49970
2022	53250