Year	Total
1801	0
1802	0
1803	0
1804	0
1805	0
1806	0
1807	0
1808	0
1809	0
1810	0
1811	0
1812	0
1813	0
1814	0
1815	0
1816	0
1817	0
1818	0
1819	0
1820	0
1821	1.427
1822	1.427
1823	1.422
1824	1.427
1825	1.427
1826	1.427
1827	1.427
1828	1.427
1829	1.426
1830	1.426
1831	1.426
1832	1.425
1833	1.425
1834	1.43
1835	1.424
1836	1.429
1837	1.423
1838	1.427
1839	1.427
1840	1.426
1841	1.425
1842	1.429
1843	1.424
1844	1.428
1845	1.427
1846	1.426
1847	1.425
1848	1.429
1849	1.423
1850	1.426
1851	1.425
1852	1.429
1853	1.423
1854	1.426
1855	1.43
1856	1.424
1857	1.427
1858	1.426
1859	1.429
1860	1.423
1861	1.426
1862	1.429
1863	1.427
1864	1.425
1865	1.424
1866	1.426
1867	1.429
1868	1.423
1869	1.43
1870	1.424
1871	1.426
1872	1.428
1873	1.426
1874	1.425
1875	1.427
1876	1.425
1877	1.427
1878	1.428
1879	1.426
1880	1.424
1881	1.426
1882	1.428
1883	1.425
1884	1.427
1885	1.425
1886	1.426
1887	1.427
1888	1.425
1889	1.426
1890	1.428
1891	1.425
1892	1.426
1893	1.427
1894	1.425
1895	1.426
1896	1.427
1897	1.427
1898	1.425
1899	1.429
1900	1.423
1901	1.427
1902	1.427
1903	1.425
1904	1.428
1905	1.426
1906	1.426
1907	1.426
1908	1.427
1909	1.424
1910	1.427
1911	1.427
1912	1.424
1913	1.427
1914	1.967
1915	1.964
1916	1.967
1917	1.964
1918	1.966
1919	1.966
1920	1.966
1921	1.966
1922	1.965
1923	1.965
1924	1.967
1925	1.964
1926	1.966
1927	1.966
1928	1.965
1929	1.967
1930	1.964
1931	1.966
1932	1.968
1933	1.964
1934	1.966
1935	1.965
1936	1.967
1937	1.966
1938	1.965
1939	1.966
1940	1.965
1941	1.967
1942	1.965
1943	1.967
1944	1.965
1945	1.964
1946	1.965
1947	1.966
1948	1.967
1949	1.964
1950	1.967
1951	1.401
1952	1.99
1953	2.413
1954	2.675
1955	2.796
1956	2.775
1957	2.634
1958	2.387
1959	2.045
1960	1.635
1961	1.186
1962	0.7396
1963	0.3325
1964	-0.00539
1965	-0.2691
1966	-0.5642
1967	-0.836
1968	-0.9012
1969	-0.6816
1970	-0.2483
1971	6.422
1972	4.813
1973	4.03
1974	5.521
1975	2.619
1976	6.113
1977	6.271
1978	7.369
1979	9.209
1980	8.201
1981	1.127
1982	-1.578
1983	-0.9653
1984	10.37
1985	6.394
1986	11.7
1987	8.705
1988	9.055
1989	7.62
1990	2.277
1991	0.3908
1992	3.357
1993	6.505
1994	5.263
1995	3.608
1996	6.566
1997	7.003
1998	0.951
1999	3.635
2000	4.322
2001	1.991
2002	1.089
2003	0.4829
2004	7.638
2005	4.777
2006	3.935
2007	4.121
2008	3.18
2009	-4.899
2010	-0.6829
2011	-2.583
2012	-1.621
2013	0.8962