Year	Number
1824	-6
1825	-6
1826	-6
1827	-6
1828	-6
1829	-6
1830	-6
1831	-6
1832	-6
1833	-6
1834	-6
1835	-6
1836	-6
1837	-6
1838	-6
1839	-6
1840	-6
1841	-6
1842	-6
1843	-6
1844	-6
1845	-6
1846	-6
1847	-6
1848	-6
1849	-6
1850	-6
1851	-6
1852	-6
1853	-6
1854	-6
1855	-6
1856	-6
1857	-6
1858	-6
1859	-6
1860	-6
1861	-6
1862	-6
1863	-6
1864	-6
1865	-6
1866	-6
1867	-6
1868	-6
1869	-6
1870	-6
1871	-6
1872	-6
1873	-6
1874	-6
1875	-6
1876	-6
1877	-6
1878	-6
1879	-6
1880	-6
1881	-6
1882	-6
1883	-6
1884	-6
1885	-6
1886	-6
1887	-6
1888	-6
1889	-3
1890	-3
1891	-3
1892	-3
1893	-3
1894	-3
1895	-3
1896	-3
1897	-3
1898	-3
1899	-3
1900	-3
1901	-3
1902	-3
1903	-3
1904	-3
1905	-3
1906	-3
1907	-3
1908	-3
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	-4
1931	-5
1932	-6
1933	-6
1934	-7
1935	-7
1936	-7
1937	-7
1938	-7
1939	-7
1940	-7
1941	-7
1942	-7
1943	-7
1944	-7
1945	0
1946	7
1947	5
1948	5
1949	5
1950	5
1951	5
1952	5
1953	5
1954	5
1955	5
1956	5
1957	5
1958	6
1959	6
1960	6
1961	5
1962	5
1963	3
1964	-3
1965	-9
1966	-9
1967	-9
1968	-9
1969	-9
1970	-9
1971	-9
1972	-9
1973	-9
1974	-4
1975	-4
1976	-4
1977	-4
1978	-4
1979	-4
1980	-4
1981	-4
1982	-3
1983	-3
1984	-3
1985	7
1986	7
1987	7
1988	8
1989	8
1990	8
1991	8
1992	8
1993	8
1994	8
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	8
2008	8
2009	8
2010	8
2011	8