Year	metric tons
1960	8504814.01
1961	10426903
1962	12300391
1963	12623322
1964	15458944
1965	14191673
1966	15933311.01
1967	17799413
1968	18925306
1969	17566384
1970	20818339
1971	19167601
1972	13474987
1973	11895309
1974	14151900
1975	13453173
1976	14401641
1977	13200412.99
1978	14936632.01
1979	15636942.01
1980	15132599
1981	15609807.58
1982	16591187.64
1983	14934562.33
1984	17477747.45
1985	19223233.700000003
1986	21216615.220000003
1987	21170617.61
1988	23826826.44
1989	24264225.31
1990	24331743.65
1991	25114723.76
1992	26967417.99
1993	29547162.970000003
1994	33210459.84
1995	31468612.61
1996	32751550.059999995
1997	31832135.88
1998	28140430.37
1999	33499112.000000004
2000	36422005.13
2001	35266034.74999999
2002	36710001.65
2003	35186985.83
2004	40211103.9
2005	41694805.239999995
2006	41251895.739999995
2007	42713064.20999999
2008	45002628.3
2009	45709233.04999998
2010	46101677.53
2011	51664414.519999996
2012	51715337.969999984
2013	56711489.11999999
2014	57350780.78
2015	60779498.32999999
2016	61275702.070000015
2017	63752502.68
2018	68391330.78
2019	66795438.58999999
2020	66924724.24999999
2021	68914735.19999999
2022	68318781.56999998