Year	metric tons
1960	2200
1961	2400
1962	2500
1963	2400
1964	3600
1965	3400
1966	3300
1967	3500
1968	5000
1969	4100
1970	8100
1971	10560
1972	12550
1973	12360
1974	15554
1975	16172
1976	14197
1977	15392
1978	22642
1979	20766
1980	16426
1981	16010
1982	12567
1983	11108
1984	16390
1985	20383
1986	22951
1987	16970
1988	16670
1989	17030
1990	18370
1991	16043
1992	16010
1993	16172
1994	17134
1995	17441
1996	24335
1997	26696
1998	24620
1999	28029
2000	35163
2001	34016
2002	33045
2003	29556
2004	20000
2005	21489
2006	19195
2007	19751
2008	21405
2009	19814
2010	17916
2011	13928
2012	15045
2013	18558
2014	14746
2015	14750
2016	11776.61
2017	12498.83
2018	14422.57
2019	17768.97
2020	26679.37
2021	29597.99
2022	33668.7