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