Year	Kilotonnes
1850	0
1851	0
1852	0
1853	0
1854	0
1855	0
1856	0
1857	0
1858	0
1859	0
1860	0
1861	0
1862	0
1863	0
1864	0
1865	0
1866	0
1867	0
1868	0
1869	0
1870	0
1871	0
1872	0
1873	0
1874	0
1875	0
1876	0
1877	0
1878	0
1879	0
1880	0
1881	0.1463
1882	0.2926
1883	0.4391
1884	0.5857
1885	0.7324
1886	0.8792
1887	1.026
1888	1.173
1889	1.32
1890	1.467
1891	1.615
1892	1.762
1893	1.91
1894	2.057
1895	2.205
1896	2.353
1897	2.501
1898	2.649
1899	3.358
1900	4.067
1901	4.958
1902	5.849
1903	0.6786
1904	7.829
1905	8.949
1906	9.209
1907	11.24
1908	11.65
1909	10.22
1910	10.63
1911	10.93
1912	11.3
1913	12.74
1914	10.01
1915	7.537
1916	3.711
1917	5.611
1918	5.42
1919	8.551
1920	8.073
1921	5.242
1922	6.295
1923	9.127
1924	11.75
1925	14.63
1926	19.11
1927	20.97
1928	19.98
1929	22.75
1930	25.34
1931	24.39
1932	24.81
1933	29.17
1934	36.54
1935	37.47
1936	37.64
1937	38.93
1938	31.47
1939	35.71
1940	40.64
1941	42.75
1942	37.21
1943	46.47
1944	52.74
1945	52.32
1946	51.29
1947	54.63
1948	56.96
1949	58.72
1950	60.74
1951	66.05
1952	67.59
1953	82.5
1954	85.65
1955	84.13
1956	90.38
1957	99.21
1958	101.8
1959	99.65
1960	95.24
1961	98.7
1962	115
1963	129
1964	143.2
1965	142.5
1966	157.5
1967	161
1968	166.5
1969	163.8
1970	164
1971	174.9
1972	195.5
1973	206.7
1974	230.5
1975	234.9
1976	248.5
1977	261.6
1978	258.4
1979	329.7
1980	323.5
1981	364.4
1982	404.9
1983	438.9
1984	514.7
1985	662
1986	760.5
1987	789
1988	685.8
1989	859.4
1990	797.1
1991	807.7
1992	806.6
1993	803.5
1994	826.5
1995	885.6
1996	920.8
1997	1012
1998	1003
1999	930.1
2000	1027