Year	metric tons
1961	15199359
1962	16249447
1963	16419357
1964	16367923
1965	16309479
1966	14568709
1967	16434157
1968	15575299
1969	18038051
1970	17726002
1971	17320573
1972	13757553
1973	16209840
1974	19923163
1975	18090195
1976	16633672
1977	16510190
1978	16377644
1979	16577215
1980	17755270
1981	18865515
1982	19099220
1983	18897609
1984	20745222
1985	24933077
1986	27936922
1987	28220526
1988	31657192
1989	32505418
1990	30908317
1991	34505155.32
1992	35084082.99
1993	36484506.16
1994	36658204.09
1995	39470756.120000005
1996	38779521.54
1997	38127324.96
1998	40960474.21
1999	42074481.81
2000	39013857.989999995
2001	40218012.33
2002	42272024.86
2003	46336463.9
2004	45462912.20999999
2005	51385454.56
2006	55355066.79
2007	52360762.67
2008	61053338.17
2009	52229362.82
2010	60518320.73
2011	51718598.55
2012	60026439.25
2013	57573656.59
2014	64586683.169999994
2015	66354902.15
2016	73281460.09
2017	73949984.45000002
2018	78653087.74000001
2019	77324797.25
2020	78318018.97
2021	75979944.24000001
2022	81587045.65