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	0.7435
1822	0.7418
1823	0.7436
1824	0.7419
1825	0.7401
1826	0.742
1827	0.7438
1828	0.742
1829	0.7438
1830	0.742
1831	0.7438
1832	0.742
1833	0.7403
1834	0.742
1835	0.7437
1836	0.7419
1837	0.7436
1838	0.7419
1839	0.7435
1840	0.7417
1841	0.7433
1842	0.7416
1843	0.7432
1844	0.7414
1845	0.743
1846	0.7412
1847	0.7428
1848	0.7442
1849	0.7425
1850	0.7408
1851	0.7422
1852	0.7437
1853	0.7419
1854	0.7434
1855	0.7416
1856	0.743
1857	0.7413
1858	0.7426
1859	0.7409
1860	0.7453
1861	0.7405
1862	0.7419
1863	0.7432
1864	0.7414
1865	0.7427
1866	0.744
1867	0.7422
1868	0.7435
1869	0.7417
1870	0.7429
1871	0.7412
1872	0.7424
1873	0.7436
1874	0.7418
1875	0.743
1876	0.7413
1877	0.7424
1878	0.7435
1879	0.7418
1880	0.7429
1881	0.7411
1882	0.7422
1883	0.7433
1884	0.7415
1885	0.7426
1886	0.7436
1887	0.7419
1888	0.7429
1889	0.7411
1890	0.7448
1891	0.7404
1892	0.744
1893	0.7423
1894	0.7406
1895	0.7442
1896	0.7424
1897	0.7407
1898	0.7442
1899	0.7425
1900	0.7407
1901	0.7442
1902	0.7424
1903	0.7407
1904	0.7441
1905	0.7424
1906	0.7432
1907	0.7414
1908	0.7422
1909	0.743
1910	0.7413
1911	0.742
1912	0.7428
1913	0.7435
1914	1.612
1915	1.612
1916	1.613
1917	1.611
1918	1.612
1919	1.613
1920	1.613
1921	1.612
1922	1.612
1923	1.613
1924	1.611
1925	1.614
1926	1.612
1927	1.611
1928	1.614
1929	1.612
1930	1.612
1931	1.613
1932	1.611
1933	1.614
1934	1.612
1935	1.611
1936	1.613
1937	1.612
1938	1.612
1939	1.613
1940	1.613
1941	1.611
1942	1.614
1943	1.612
1944	1.613
1945	1.611
1946	1.613
1947	1.612
1948	1.612
1949	1.613
1950	1.613
1951	3.792
1952	4.033
1953	4.169
1954	4.222
1955	4.225
1956	4.213
1957	4.2
1958	4.209
1959	4.248
1960	4.312
1961	4.379
1962	4.42
1963	4.409
1964	4.328
1965	4.216
1966	4.083
1967	3.985
1968	3.964
1969	4.042
1970	4.178
1971	4.315
1972	4.412
1973	4.463
1974	34.46
1975	-4.641
1976	1.905
1977	-1.003
1978	17.52
1979	3.822
1980	-11.5
1981	4.113
1982	10.62
1983	21.24
1984	6.807
1985	1.044
1986	-2.095
1987	0.355
1988	0.4954
1989	3.344
1990	4.686
1991	12.02
1992	-0.8155
1993	4.408
1994	2.458
1995	4.604
1996	7.092
1997	4.849
1998	4.261
1999	-3.193
2000	2.692
2001	-2.668
2002	-7.145
2003	3.309
2004	5.626
2005	6.926
2006	8.844
2007	5.488
2008	6.724
2009	3.542
2010	1.854
2011	1.631
2012	1.935
2013	-1.018