Year	metric tons
1960	8300
1961	8600
1962	9100
1963	9600
1964	12000
1965	15900
1966	16200
1967	16200
1968	14600
1969	14400
1970	17200
1971	19100
1972	14800
1973	4700
1974	5900
1975	3930
1976	2970
1977	2472
1978	2515
1979	2800
1980	3507
1981	3828
1982	3750
1983	3900
1984	4300
1985	4000
1986	4100
1987	4000
1988	4067
1989	4269
1990	4981
1991	4262
1992	4607
1993	4203
1994	5318
1995	6380
1996	8808
1997	10394
1998	14014
1999	15873
2000	15696
2001	15405
2002	12315
2003	9228
2004	10030
2005	9475
2006	9915
2007	13279
2008	16795
2009	17072
2010	18083
2011	24066
2012	28759
2013	38416.3
2014	50204.5
2015	50579.5
2016	50516.24
2017	56127.1
2018	63885.77
2019	59430.89
2020	60536
2021	73880
2022	102470