Year	metric tons
1960	10900
1961	10500
1962	7700
1963	8100
1964	12200
1965	15800
1966	12500
1967	10900
1968	11000
1969	12700
1970	13200
1971	14400
1972	20600
1973	17500
1974	16000
1975	26333
1976	33804
1977	48374
1978	74299
1979	108170
1980	120399
1981	146919
1982	118988
1983	143416
1984	132969
1985	138413
1986	140753
1987	137802
1988	107342
1989	121713
1990	90829
1991	143711
1992	125751
1993	118815
1994	120732
1995	126446
1996	123330
1997	136954
1998	140707
1999	106584
2000	113326
2001	104982
2002	108102
2003	117269
2004	122989
2005	125818.05
2006	133987
2007	108722.2
2008	108797
2009	80872
2010	74153
2011	89269.13
2012	76161.75
2013	59195.87
2014	65080.72
2015	59540.1
2016	51551.74
2017	65308.64
2018	69725.34
2019	68005.78
2020	62879.97
2021	66300.6
2022	68781.65