Year	Number
1827	-5
1828	-5
1829	-5
1830	-4
1831	-4
1832	-4
1833	-3
1834	-3
1835	-3
1836	-3
1837	-3
1838	-3
1839	-3
1840	-3
1841	-3
1842	-3
1843	-3
1844	-4
1845	-4
1846	-4
1847	-4
1848	-4
1849	-4
1850	-4
1851	-4
1852	-4
1853	-4
1854	-4
1855	-4
1856	-4
1857	-4
1858	-4
1859	-4
1860	-4
1861	-4
1862	0
1863	3
1864	7
1865	7
1866	7
1867	7
1868	7
1869	7
1870	9
1871	9
1872	9
1873	9
1874	9
1875	9
1876	9
1877	9
1878	9
1879	9
1880	10
1881	10
1882	10
1883	10
1884	10
1885	10
1886	10
1887	10
1888	10
1889	10
1890	10
1891	10
1892	10
1893	10
1894	10
1895	10
1896	10
1897	10
1898	10
1899	10
1900	10
1901	10
1902	10
1903	10
1904	10
1905	10
1906	10
1907	10
1908	10
1909	10
1910	10
1911	10
1912	10
1913	10
1914	10
1915	1
1916	1
1917	1
1918	1
1919	1
1920	1
1921	1
1922	0
1923	-2
1924	-3
1925	-6
1926	10
1927	10
1928	10
1929	10
1930	10
1931	10
1932	10
1933	10
1934	8
1935	8
1936	-8
1937	-8
1938	-8
1939	-8
1940	-8
1941	0
1942	0
1943	0
1944	8
1945	8
1946	8
1947	8
1948	8
1949	4
1950	4
1951	4
1952	4
1953	4
1954	4
1955	4
1956	4
1957	4
1958	4
1959	4
1960	4
1961	4
1962	4
1963	4
1964	4
1965	4
1966	4
1967	-7
1968	-7
1969	-7
1970	-7
1971	-7
1972	-7
1973	-7
1974	1
1975	8
1976	8
1977	8
1978	8
1979	8
1980	8
1981	8
1982	8
1983	8
1984	8
1985	8
1986	10
1987	10
1988	10
1989	10
1990	10
1991	10
1992	10
1993	10
1994	10
1995	10
1996	10
1997	10
1998	10
1999	10
2000	10
2001	10
2002	10
2003	10
2004	10
2005	10
2006	10
2007	10
2008	10
2009	10
2010	10
2011	10