Year	metric tons
1960	1386242
1961	1526110
1962	1321110
1963	1387712
1964	1607390
1965	2308641
1966	2866895
1967	3250563
1968	2804048
1969	2490563
1970	2982617
1971	3102485
1972	3204036
1973	3014959
1974	2668746
1975	2552937
1976	3416921
1977	3542408
1978	2709374
1979	2761041
1980	2527793
1981	2687298
1982	2634880
1983	2949720
1984	2576309
1985	2217619
1986	2024215
1987	2067226
1988	1922054
1989	1971978
1990	1799942
1991	2202684
1992	2620116
1993	2584737
1994	2551184
1995	2709144
1996	2821618
1997	3054740
1998	3040985
1999	2806076
2000	2891791
2001	2862152
2002	2923116
2003	2702012
2004	2672699
2005	2546500
2006	2401781
2007	2514659
2008	2583895.25
2009	2693500.41
2010	2838470.07
2011	2442576.51
2012	2282646.45
2013	2241396.58
2014	2450364.12
2015	2452205.1
2016	2201293.54
2017	2558757.47
2018	2665068.3
2019	2478585.84
2020	2625367.78
2021	2579734.22
2022	2613634.37