Year	Tonnes
1941	11001
1942	22002
1943	33003
1948	36670
1949	40337
1950	128345
1951	190684
1952	289693
1953	473043
1954	744401
1955	971755
1956	1213777
1957	1536473
1958	1855502
1959	2192866
1960	2544898
1961	2885929
1962	3281965
1963	3703670
1964	4110707
1965	4756099
1966	5581174
1967	6655605
1968	8382762
1969	10051247
1970	11705064
1971	13556899
1972	14965027
1973	16717853
1974	18456011
1975	19666121
1976	20843228
1977	21891990
1978	23263448
1979	25111616
1980	26934115
1981	28800618
1982	30282086
1983	32126587
1984	33791405
1985	35606570
1986	37821438
1987	40403006
1988	43076249
1989	45903506
1990	48921447
1991	51906385
1992	54872988
1993	57901930
1994	60142467
1995	62705700
1996	65565960
1997	68616904
1998	71836530
1999	74993817
2000	78543473
2001	82896202
2002	87417613
2003	92404733
2004	97699881
2005	102819013
2006	108323180
2007	114337060
2008	120915658
2009	127545594
2010	134131526
2011	141857895
2012	150420340
2013	161054640
2014	172653361