Year	metric tons
1960	52872
1961	54532
1962	56165
1963	57955
1964	59818
1965	63355
1966	63596
1967	65645
1968	65996
1969	70017
1970	72485
1971	76484
1972	77659
1973	80510
1974	81638
1975	84970
1976	89937
1977	91359
1978	98181
1979	104178
1980	109782
1981	117669
1982	124991
1983	133306
1984	147509
1985	162784
1986	193824
1987	220119
1988	232751
1989	265651
1990	275598
1991	328106
1992	384904.9
1993	418872.03
1994	461751
1995	541335
1996	621173
1997	746153
1998	844563
1999	901427.02
2000	993927
2001	1161889
2002	1363727
2003	1506509
2004	1723629.7
2005	1832105.42
2006	2046558.04
2007	2163517.1900000004
2008	2388825.24
2009	2594685.39
2010	3044981.2399999998
2011	3329803.6900000004
2012	3711957.5999999996
2013	3954996.15
2014	4220290.5
2015	4452371.93
2016	4592140.14
2017	4817468.139999999
2018	5053869.2
2019	5170651.649999999
2020	5479054.4799999995
2021	5645000.2
2022	5687587.51