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	0.79
1822	0.7915
1823	0.7912
1824	0.7909
1825	0.7906
1826	0.7902
1827	0.7916
1828	0.7913
1829	0.791
1830	0.7906
1831	0.7903
1832	0.7916
1833	0.7895
1834	0.7908
1835	0.7921
1836	0.79
1837	0.7913
1838	0.7909
1839	0.7905
1840	0.79
1841	0.7912
1842	0.7908
1843	0.7919
1844	0.7899
1845	0.791
1846	0.7906
1847	0.7916
1848	0.7912
1849	0.7907
1850	0.7902
1851	0.7912
1852	0.7907
1853	0.7902
1854	0.7912
1855	0.7907
1856	0.7916
1857	0.7896
1858	0.792
1859	0.79
1860	0.7909
1861	0.7903
1862	0.7912
1863	0.7906
1864	0.7915
1865	0.7909
1866	0.7903
1867	0.7911
1868	0.7905
1869	0.7913
1870	0.7907
1871	0.7901
1872	0.7908
1873	0.7916
1874	0.7909
1875	0.7903
1876	0.791
1877	0.7917
1878	0.7896
1879	0.7917
1880	0.791
1881	0.7903
1882	0.7909
1883	0.7915
1884	0.7908
1885	0.7901
1886	0.7907
1887	0.7913
1888	0.7905
1889	0.7911
1890	0.7903
1891	0.7909
1892	0.7914
1893	0.7906
1894	0.7911
1895	0.7903
1896	0.7908
1897	0.7913
1898	0.7905
1899	0.7909
1900	0.7913
1901	0.7905
1902	0.7909
1903	0.7913
1904	0.7905
1905	0.7909
1906	0.79
1907	0.7916
1908	0.7907
1909	0.7911
1910	0.7902
1911	0.7905
1912	0.7908
1913	0.7911
1914	2.14
1915	2.139
1916	2.139
1917	2.14
1918	2.14
1919	2.139
1920	2.139
1921	2.139
1922	2.139
1923	2.14
1924	2.14
1925	2.139
1926	2.139
1927	2.14
1928	2.139
1929	2.138
1930	2.14
1931	2.14
1932	2.358
1933	2.357
1934	2.358
1935	2.359
1936	2.357
1937	2.358
1938	2.358
1939	2.357
1940	2.358
1941	2.358
1942	2.358
1943	2.358
1944	2.357
1945	2.359
1946	2.357
1947	2.358
1948	2.358
1949	2.358
1950	2.358
1951	2.949
1952	3.042
1953	3.134
1954	3.226
1955	3.321
1956	3.413
1957	3.506
1958	3.6
1959	3.693
1960	4.319
1961	4.319
1962	4.319
1963	4.319
1964	4.319
1965	3.859
1966	4.524
1967	4.447
1968	3.566
1969	-3.508
1970	3.109
1971	2.392
1972	-28.28
1973	11.63
1974	26.42
1975	-11.81
1976	13.92
1977	14.53
1978	8.966
1979	24.85
1980	-6.139
1981	13.27
1982	2.646
1983	13.53
1984	0.9809
1985	0.6534
1986	19.66
1987	2.369
1988	3.597
1989	8.109
1990	1.759
1991	5.972
1992	12.65
1993	3.938
1994	9.144
1995	8.166
1996	1.541
1997	-1.502
1998	1.738
1999	-0.4852
2000	-14.22
2001	-8.871
2002	-1.47
2003	6.667
2004	8.283
2005	5.295
2006	4.461
2007	6.852
2008	7.544
2009	-4.387
2010	6.135
2011	10.71
2012	5.286
2013	3.16