Year	Number
1838	-5
1839	-5
1840	-5
1841	-5
1842	-5
1843	-5
1844	-5
1845	-5
1846	-5
1847	-5
1848	-5
1849	-5
1850	-5
1851	-5
1852	-5
1853	-5
1854	-5
1855	-5
1856	-5
1857	-5
1858	-5
1859	-5
1860	-5
1861	-5
1862	-5
1863	-5
1864	-5
1865	-5
1866	-5
1867	-5
1868	-5
1869	-5
1870	-5
1871	-5
1872	-5
1873	-5
1874	-5
1875	-5
1876	-5
1877	-5
1878	-5
1879	-5
1880	-5
1881	-5
1882	-5
1883	-5
1884	-5
1885	-5
1886	-5
1887	-5
1888	-5
1889	-5
1890	-5
1891	-5
1892	-5
1893	-5
1894	-5
1895	-5
1896	-5
1897	-5
1898	-5
1899	-5
1900	-5
1901	-5
1902	-5
1903	-5
1904	-5
1905	-5
1906	-5
1907	-5
1908	-5
1909	-3
1910	-3
1911	-3
1912	-3
1913	-3
1914	-3
1915	-3
1916	-3
1917	-3
1918	-3
1919	-3
1920	-3
1921	-3
1922	-3
1923	-3
1924	-3
1925	-3
1926	-3
1927	-3
1928	-3
1929	-3
1930	-3
1931	-3
1932	-3
1933	-3
1934	-3
1935	-3
1936	-8
1937	-8
1938	-8
1939	-8
1940	-8
1941	-8
1942	-8
1943	-8
1944	-8
1945	-8
1946	-8
1947	-8
1948	-8
1949	-8
1950	-8
1951	-8
1952	-8
1953	-8
1954	-8
1955	-8
1956	-8
1957	-8
1958	-8
1959	-8
1960	-8
1961	-8
1962	-8
1963	-8
1964	-8
1965	-8
1966	-8
1967	-8
1968	-8
1969	-8
1970	-8
1971	-8
1972	-8
1973	-8
1974	-8
1975	-8
1976	-8
1977	-8
1978	-8
1979	0
1980	0
1981	-5
1982	-5
1983	-5
1984	-1
1985	-1
1986	-1
1987	-1
1988	-1
1989	-1
1990	6
1991	6
1992	6
1993	6
1994	6
1995	8
1996	8
1997	8
1998	8
1999	8
2000	8
2001	8
2002	8
2003	8
2004	8
2005	8
2006	8
2007	9
2008	9
2009	9
2010	9
2011	9