Year	metric tons
1960	3173600
1961	3173600
1962	3280400
1963	3348000
1964	3483200
1965	3690000
1966	3825200
1967	3825200
1968	3931900
1969	4067100
1970	3970690
1971	4494570
1972	4996282
1973	4922582
1974	5360583
1975	5654493
1976	5703574
1977	6411153
1978	6438622
1979	5973332
1980	6252312
1981	6174007
1982	6766618
1983	7327544
1984	8211953
1985	9236137
1986	10416481
1987	11733919
1988	13189029
1989	14326208
1990	15107495
1991	17147309
1992	20607711
1993	24697356
1994	29231422
1995	33865204
1996	37799524
1997	38467260
1998	41144461
1999	43209033
2000	44573574
2001	45506377
2002	47586869
2003	49490650
2004	51958654
2005	53793997
2006	55906797.49
2007	57517796.3
2008	59230149.73
2009	61125855.71
2010	62843813.78
2011	64411221.25
2012	67528903.81
2013	70662625.2
2014	73683870.14
2015	76016876.27000001
2016	78337639.43
2017	79935166.11
2018	80966168.45
2019	82593752.44999999
2020	83929521.5
2021	85948133.98
2022	88567716.02