Year	Number
1825	-5
1826	-5
1827	-5
1828	-5
1829	-5
1830	-5
1831	-5
1832	-5
1833	-5
1834	-5
1835	-5
1836	-5
1837	-5
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	-4
1853	-3
1854	-3
1855	-3
1856	-3
1857	-3
1858	-3
1859	-3
1860	-3
1861	-3
1862	-3
1863	-3
1864	-3
1865	-3
1866	-3
1867	-3
1868	-3
1869	-3
1870	-3
1871	-3
1872	-3
1873	-3
1874	-3
1875	-3
1876	-3
1877	-3
1878	-3
1879	-3
1880	1
1881	1
1882	1
1883	1
1884	1
1885	1
1886	1
1887	1
1888	1
1889	1
1890	1
1891	1
1892	1
1893	1
1894	1
1895	1
1896	1
1897	1
1898	1
1899	1
1900	1
1901	1
1902	1
1903	1
1904	1
1905	1
1906	1
1907	1
1908	1
1909	1
1910	1
1911	1
1912	2
1913	2
1914	2
1915	2
1916	2
1917	2
1918	2
1919	2
1920	2
1921	2
1922	2
1923	2
1924	2
1925	2
1926	2
1927	2
1928	2
1929	2
1930	-8
1931	-8
1932	-8
1933	-8
1934	-8
1935	-8
1936	-8
1937	5
1938	5
1939	5
1940	5
1941	5
1942	5
1943	-8
1944	-8
1945	-8
1946	-8
1947	-9
1948	-9
1949	-9
1950	-9
1951	-9
1952	-9
1953	-9
1954	-9
1955	-6
1956	-3
1957	-1
1958	-1
1959	-1
1960	-1
1961	-1
1962	-1
1963	-1
1964	-1
1965	-1
1966	-9
1967	-9
1968	-9
1969	-9
1970	-9
1971	-9
1972	-9
1973	6
1974	6
1975	6
1976	-9
1977	-9
1978	-9
1979	-9
1980	-9
1981	-8
1982	-8
1983	8
1984	8
1985	8
1986	8
1987	8
1988	8
1989	7
1990	7
1991	7
1992	7
1993	7
1994	7
1995	7
1996	7
1997	7
1998	7
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