Year	Kilotonnes
1850	14.4
1851	9.606
1852	18.01
1853	15.62
1854	19.22
1855	18.03
1856	25.24
1857	28.84
1858	30.05
1859	27.66
1860	40.86
1861	39.67
1862	44.47
1863	38.48
1864	50.49
1865	49.29
1866	39.7
1867	51.7
1868	49.31
1869	61.32
1870	52.92
1871	46.93
1872	58.93
1873	50.54
1874	57.75
1875	57.75
1876	62.56
1877	52.97
1878	57.77
1879	55.38
1880	48.18
1881	48.43
1882	54.68
1883	39.33
1884	55.18
1885	49.43
1886	47.28
1887	37.93
1888	42.98
1889	32.43
1890	35.08
1891	28.13
1892	28.38
1893	31.03
1894	31.28
1895	30.34
1896	32.85
1897	29.96
1898	36.68
1899	35.93
1900	39.88
1901	47.3
1902	46.45
1903	51.45
1904	51.26
1905	49.63
1906	48.57
1907	50.34
1908	67.84
1909	68.26
1910	65.5
1911	65.2
1912	75.04
1913	74.09
1914	87.31
1915	83.93
1916	111.1
1917	150.2
1918	155.6
1919	122.9
1920	138.9
1921	93.68
1922	172.6
1923	234.6
1924	249.6
1925	249.1
1926	261.2
1927	305.4
1928	351.5
1929	390.5
1930	273.7
1931	269.3
1932	134.4
1933	208.3
1934	315.2
1935	326.2
1936	312.1
1937	481.4
1938	413.5
1939	396.9
1940	421.7
1941	528.7
1942	540.9
1943	551.1
1944	547
1945	509.9
1946	395.4
1947	459.3
1948	471.8
1949	399.2
1950	380.3
1951	395.8
1952	422.4
1953	373.1
1954	370.3
1955	433.3
1956	479.9
1957	466.8
1958	442.3
1959	502.1
1960	485.3
1961	495.4
1962	523.1
1963	520.8
1964	540.6
1965	500.1
1966	549.5
1967	544.9
1968	541.5
1969	565.5
1970	558.8
1971	563.8
1972	559.2
1973	562.8
1974	672.9
1975	603.8
1976	706.9
1977	732.7
1978	703.1
1979	712.9
1980	709.3
1981	701.9
1982	778.3
1983	785.7
1984	804.2
1985	838.5
1986	865.6
1987	867.2
1988	906.8
1989	1003
1990	998.4
1991	984
1992	1103
1993	1016
1994	1057
1995	1306
1996	1514
1997	1793
1998	1873
1999	2143
2000	1375