Year	Tonnes
1878	355.699
1879	506.046
1880	656.393
1881	737.067
1882	828.742
1883	927.751
1884	1059.763
1885	1129.436
1886	1180.774
1887	1239.446
1888	1364.124
1889	1312.786
1890	1422.796
1891	1492.469
1892	1503.47
1893	1543.807
1894	1609.813
1895	1624.481
1896	1771.161
1897	1877.504
1898	2024.184
1899	2178.198
1900	2442.222
1901	2742.916
1902	3043.61
1903	3171.955
1904	3435.979
1905	3542.322
1906	3865.018
1907	4088.705
1908	4154.711
1909	4268.388
1910	4906.446
1911	4613.086
1912	4866.109
1913	4217.05
1914	5086.129
1915	4935.782
1916	5042.125
1917	4620.42
1918	4547.08
1919	4132.709
1920	3560.657
1921	3501.985
1922	3564.324
1923	3839.349
1924	3993.363
1925	4092.372
1926	4275.722
1927	4499.409
1928	4719.429
1929	4899.112
1930	4869.776
1931	4242.719
1932	3542.322
1933	3549.656
1934	3986.029
1935	4154.711
1936	4180.38
1937	4385.732
1938	4250.053
1939	4466.406
1940	4763.433
1941	5005.455
1942	5100.797
1943	5375.822
1944	5474.831
1945	5625.178
1946	5537.17
1947	5456.496
1948	5507.834
1949	5614.177
1950	8577.113
1951	8177.41
1952	9328.848
1953	8558.778
1954	9075.825
1955	9402.188
1956	9684.547
1957	10315.271
1958	10190.593
1959	10329.939
1960	11543.716
1961	11767.403
1962	11210.019
1963	12229.445
1964	13105.858
1965	13699.912
1966	14015.274
1967	13641.24
1968	13487.226
1969	14271.964
1970	14194.957
1971	15060.369
1972	16197.139
1973	18202.988
1974	18756.705
1975	18261.66
1976	19237.082
1977	20300.512
1978	18008.637
1979	16475.831
1980	17458.587
1981	16527.169
1982	18239.658
1983	17964.633
1984	19295.754
1985	21803.982
1986	22893.081
1987	24110.525
1988	25397.642
1989	25404.976
1990	23545.807
1991	24084.856
1992	25082.28
1993	26688.426
1994	26681.092
1995	27132.133
1996	28642.937
1997	31022.82
1998	30029.063
1999	32639.967
2000	32980.998
2001	34447.798
2002	33201.018
2003	34081.098
2004	34554.141
2005	34139.77
2006	33446.707
2007	33637.391
2008	34202.109
2009	32386.944
2010	31781.889
2011	31503.197
2012	34150.771
2013	33457.708
2014	34664.151