Year	metric tons
1960	49237
1961	50569
1962	51944
1963	53362
1964	54824
1965	58030
1966	57897
1967	59519
1968	59460
1969	62927
1970	64716
1971	68080
1972	68508
1973	70525
1974	70970
1975	73340
1976	77063
1977	77230
1978	82760
1979	87360
1980	91030
1981	96780
1982	101630
1983	107000
1984	117025
1985	123811
1986	144723
1987	166100
1988	175925
1989	183505
1990	192592
1991	210993
1992	226863
1993	237743
1994	264190
1995	317073
1996	379087
1997	485864
1998	574812
1999	593202
2000	657120
2001	712640
2002	786604
2003	856956
2004	914752
2005	882091
2006	892049
2007	945812
2008	1005542
2009	1064285
2010	1308515
2011	1523759
2012	1726066
2013	1859808
2014	1956925
2015	2060408
2016	2203554
2017	2333352
2018	2405416
2019	2488600
2020	2583866
2021	2638745
2022	2731070