Year	Tonnes
1949	14.668
1950	84.341
1951	91.675
1952	91.675
1953	106.343
1954	106.343
1955	154.014
1956	183.35
1957	293.36
1958	330.03
1959	385.035
1960	414.371
1961	491.378
1962	689.396
1963	707.731
1964	839.743
1965	1008.425
1966	1092.766
1967	1283.45
1968	1224.778
1969	942.419
1970	1672.152
1971	1895.839
1972	1532.806
1973	1639.149
1974	1917.841
1975	2126.86
1976	1987.514
1977	2390.884
1978	2159.863
1979	2240.537
1980	1760.16
1981	1983.847
1982	2101.191
1983	2522.896
1984	2830.924
1985	3509.319
1986	3142.619
1987	3124.284
1988	2867.594
1989	2775.919
1990	2614.571
1991	2438.555
1992	1393.46
1993	1345.789
1994	1294.451
1995	1243.113
1996	1177.107
1997	1096.433
1998	1041.428
1999	821.408
2000	773.737
2001	817.741
2002	1070.764
2003	1195.442
2004	949.753
2005	1327.454
2006	1650.15
2007	2273.54
2008	4206.049
2009	6769.282
2010	8463.436
2011	12240.446
2012	10755.311
2013	10014.577
2014	9809.225