Year	Number
1800	-6
1801	-6
1802	-6
1803	-6
1804	-6
1805	-6
1806	-6
1807	-6
1808	-6
1809	-6
1810	-6
1811	-6
1812	-6
1813	-6
1814	-6
1815	-6
1816	-6
1817	-6
1818	-6
1819	-6
1820	-6
1821	-6
1822	-6
1823	-6
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	-6
1890	-6
1891	-6
1892	-6
1893	-6
1894	-6
1895	-6
1896	-6
1897	-6
1898	-6
1899	-6
1900	-6
1901	-6
1902	-6
1903	-6
1904	-6
1905	-6
1906	-6
1907	-6
1908	-6
1909	-6
1910	-6
1911	-2
1912	2
1913	-2
1914	-5
1915	-5
1916	-5
1917	-5
1918	-5
1919	-5
1920	-5
1921	-5
1922	-5
1923	-5
1924	-5
1925	-5
1926	-5
1927	-5
1928	-5
1929	-5
1930	-5
1931	-5
1932	-5
1933	-5
1934	-5
1935	-5
1936	-5
1937	-10
1938	-10
1939	-10
1940	-10
1941	-10
1942	-10
1943	-10
1944	-10
1945	-10
1946	-5
1947	-5
1948	-5
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	-9
1967	-9
1968	-9
1969	-8
1970	-8
1971	-8
1972	-8
1973	-8
1974	-8
1975	-8
1976	-7
1977	-7
1978	-7
1979	-7
1980	-7
1981	-7
1982	-7
1983	-7
1984	-7
1985	-7
1986	-7
1987	-7
1988	-7
1989	-7
1990	-7
1991	-7
1992	-7
1993	-7
1994	-7
1995	-7
1996	-7
1997	-7
1998	-7
1999	-7
2000	-7
2001	-7
2002	-7
2003	-7
2004	-7
2005	-7
2006	-7
2007	-7
2008	-7
2009	-7
2010	-7
2011	-7