Year	Number
1800	-10
1801	-10
1802	-10
1803	-10
1804	-10
1805	-10
1806	-10
1807	-10
1808	-10
1809	-10
1810	-10
1811	-10
1812	-10
1813	-10
1814	-10
1815	-10
1816	-10
1817	-10
1818	-10
1819	-10
1820	-10
1821	-10
1822	-10
1823	-10
1824	-10
1825	-10
1826	-10
1827	-10
1828	-10
1829	-10
1830	-10
1831	-10
1832	-10
1833	-10
1834	-10
1835	-10
1836	-10
1837	-10
1838	-10
1839	-10
1840	-10
1841	-10
1842	-10
1843	-10
1844	-10
1845	-10
1846	-10
1847	-10
1848	-10
1849	-10
1850	-10
1851	-10
1852	-10
1853	-10
1854	-10
1855	-10
1856	-10
1857	-10
1858	-10
1859	-10
1860	-10
1861	-10
1862	-10
1863	-10
1864	-10
1865	-10
1866	-10
1867	-10
1868	-10
1869	-10
1870	-10
1871	-10
1872	-10
1873	-10
1874	-10
1875	-10
1876	-10
1877	-10
1878	-10
1879	-10
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	0
1907	0
1908	0
1909	0
1910	0
1911	0
1912	0
1913	0
1914	0
1915	0
1916	0
1917	0
1918	0
1919	0
1920	0
1921	-1
1922	-3
1923	-4
1924	-6
1925	-7
1926	-7
1927	-7
1928	-7
1929	-7
1930	-7
1931	-7
1932	-7
1933	-7
1934	-7
1935	-8
1936	-8
1937	-8
1938	-8
1939	-8
1940	-8
1941	-1
1942	-1
1943	-1
1944	-1
1945	-1
1946	-1
1947	-1
1948	-1
1949	-1
1950	-1
1951	-1
1952	-1
1953	-4
1954	-7
1955	-10
1956	-10
1957	-10
1958	-10
1959	-10
1960	-10
1961	-10
1962	-10
1963	-10
1964	-10
1965	-10
1966	-10
1967	-10
1968	-10
1969	-10
1970	-10
1971	-10
1972	-10
1973	-10
1974	-10
1975	-10
1976	-10
1977	-10
1978	-10
1979	0
1980	-2
1981	-4
1982	-6
1983	-6
1984	-6
1985	-6
1986	-6
1987	-6
1988	-6
1989	-6
1990	-6
1991	-6
1992	-6
1993	-6
1994	-6
1995	-6
1996	-6
1997	3
1998	3
1999	3
2000	3
2001	3
2002	3
2003	3
2004	-6
2005	-6
2006	-6
2007	-6
2008	-6
2009	-7
2010	-7
2011	-7