Year	metric tons
1960	1489153
1961	1581366
1962	1700214
1963	1741763
1964	1877354
1965	1981517
1966	2058499
1967	2153337
1968	2283147
1969	2411488
1970	2553216
1971	2723160
1972	2940157
1973	2999276
1974	3006513
1975	2908709
1976	2928648
1977	3042944
1978	3055612
1979	3005498
1980	3011698
1981	3084580
1982	3108704
1983	3271204.2399999998
1984	3368754.14
1985	3441403.11
1986	3684733.3200000003
1987	3813439.7800000003
1988	3840745.9699999997
1989	3939644.69
1990	4040925.36
1991	4102876.77
1992	4310541.800000001
1993	4337883.92
1994	4280965.97
1995	4485134.33
1996	4543769.36
1997	4844467.33
1998	4891425.35
1999	5504686.85
2000	5723961.449999999
2001	6041838.869999999
2002	6158176.06
2003	6693145.92
2004	7284076.6
2005	7561079.53
2006	7690743.15
2007	7866230.89
2008	7859954.34
2009	8325931.3
2010	8492719.34
2011	8677654.46
2012	8929668.84
2013	8979871.9
2014	9225612.569999998
2015	9249177.899999999
2016	9737534.729999999
2017	10488933.45
2018	10738339.29
2019	10727963.200000001
2020	10449237.15
2021	10490515.179999998
2022	10453958.909999998