Year	metric tons
1960	355378
1961	377196
1962	388568
1963	395210
1964	450171
1965	438325
1966	532065
1967	470574
1968	438805
1969	451418
1970	477023
1971	456541
1972	500180
1973	647139
1974	620233
1975	570463
1976	652057
1977	642247
1978	663772.9
1979	733672.7999999999
1980	788076.1
1981	823275.0800000001
1982	859521.64
1983	958297.2400000001
1984	1000339.8800000001
1985	1089847.99
1986	1259917.55
1987	1258550.0499999998
1988	1412698.6500000001
1989	1400398.3199999998
1990	1467270.06
1991	1529456.55
1992	1559588.81
1993	1665617.32
1994	1843723.47
1995	2015834.68
1996	1824133.21
1997	2038599.51
1998	2063176.7000000002
1999	2221265.48
2000	2483844.9299999997
2001	2772155.9899999998
2002	2682814.9699999997
2003	2795951.72
2004	2848264.57
2005	3036479.61
2006	3063613.94
2007	3025434.82
2008	3136687.79
2009	3399417.8400000003
2010	3583349.7800000003
2011	3537840.21
2012	3967036.4999999995
2013	4186724.9300000006
2014	4365405.3100000005
2015	4381262.13
2016	4754996.8100000005
2017	4861607.020000001
2018	5122684.04
2019	5302759.140000001
2020	5141176.639999999
2021	5199773.220000001
2022	4117477.65