Year	metric tons
1960	600
1961	600
1962	600
1963	600
1964	800
1965	800
1966	900
1967	1000
1968	1100
1969	1100
1970	1419
1971	1519
1972	1519
1973	1627
1974	1700
1975	2000
1976	2200
1977	2500
1978	2600
1979	1024
1980	969
1981	891
1982	921
1983	910
1984	946
1985	1052
1986	840
1987	651
1988	791
1989	807
1990	948
1991	1016
1992	1107
1993	1395
1994	1345
1995	1343
1996	1402
1997	1416
1998	1709
1999	1900
2000	2027
2001	2160
2002	1895
2003	1668
2004	1706
2005	1590
2006	1647
2007	1732
2008	1895
2009	2066
2010	1964
2011	1811
2012	1943.51
2013	1991.64
2014	1981.44
2015	2030.47
2016	2117.64
2017	2091.51
2018	2019.92
2019	1845.1
2020	1423.83
2021	1414.47
2022	1442.65