Year	metric tons
1960	360080
1961	360110
1962	360140
1963	360180
1964	360230
1965	360290
1966	360350
1967	381130
1968	396620
1969	414520
1970	432400
1971	442700
1972	453300
1973	463400
1974	433840
1975	485140
1976	501560
1977	518700
1978	539690
1979	564070
1980	580010
1981	594540
1982	584410
1983	587550
1984	613691
1985	648804
1986	686523
1987	685864
1988	704547
1989	733763
1990	743818
1991	735494
1992	757498
1993	791378
1994	810825
1995	823410
1996	673788
1997	863540
1998	912618
1999	1011124
2000	1192112
2001	1309146
2002	1474460
2003	1595870
2004	1986960
2005	2217470
2006	2398440
2007	2512410
2008	2582074
2009	2671896.4
2010	2813941
2011	2795076.4
2012	2850600
2013	2849781
2014	2934805.83
2015	2970100.0300000003
2016	3090004.34
2017	3204132.01
2018	3168439.45
2019	3033318.6399999997
2020	3122143
2021	2833096.69
2022	3061808