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	1.393
1822	1.398
1823	1.392
1824	1.397
1825	1.402
1826	1.396
1827	1.391
1828	1.395
1829	1.4
1830	1.394
1831	1.389
1832	1.402
1833	1.397
1834	1.392
1835	1.396
1836	1.399
1837	1.394
1838	1.389
1839	1.401
1840	1.396
1841	1.391
1842	1.403
1843	1.389
1844	1.401
1845	1.395
1846	1.39
1847	1.401
1848	1.396
1849	1.391
1850	1.394
1851	1.397
1852	1.399
1853	1.394
1854	1.397
1855	1.391
1856	1.402
1857	1.389
1858	1.399
1859	1.394
1860	1.396
1861	1.398
1862	1.393
1863	1.395
1864	1.397
1865	1.399
1866	1.394
1867	1.396
1868	1.39
1869	1.4
1870	1.394
1871	1.396
1872	1.398
1873	1.392
1874	1.394
1875	1.395
1876	1.397
1877	1.398
1878	1.393
1879	1.394
1880	1.396
1881	1.397
1882	1.398
1883	1.393
1884	1.394
1885	1.395
1886	1.396
1887	1.397
1888	1.398
1889	1.393
1890	1.393
1891	1.4
1892	1.395
1893	1.396
1894	1.396
1895	1.391
1896	1.398
1897	1.398
1898	1.393
1899	1.393
1900	1.399
1901	1.394
1902	1.394
1903	1.395
1904	1.4
1905	1.395
1906	1.395
1907	1.395
1908	1.395
1909	1.395
1910	1.395
1911	1.395
1912	1.395
1913	1.395
1914	2.23
1915	2.229
1916	2.229
1917	2.234
1918	2.229
1919	2.228
1920	2.233
1921	2.227
1922	2.232
1923	2.231
1924	2.226
1925	2.23
1926	2.23
1927	2.234
1928	2.229
1929	2.228
1930	2.232
1931	2.231
1932	2.23
1933	2.229
1934	2.229
1935	2.232
1936	2.231
1937	2.23
1938	2.229
1939	2.228
1940	2.231
1941	2.23
1942	2.229
1943	2.228
1944	2.231
1945	2.23
1946	2.229
1947	2.232
1948	2.23
1949	2.229
1950	2.232
1951	7.575
1952	7.074
1953	6.76
1954	6.61
1955	6.58
1956	6.672
1957	6.861
1958	7.125
1959	7.449
1960	7.798
1961	8.156
1962	8.477
1963	8.744
1964	8.932
1965	9.049
1966	9.172
1967	9.245
1968	9.162
1969	8.903
1970	8.555
1971	8.219
1972	7.972
1973	7.805
1974	3.083
1975	3.105
1976	3.143
1977	3.223
1978	3.424
1979	3.765
1980	4.187
1981	4.545
1982	4.843
1983	5.19
1984	5.593
1985	5.964
1986	6.338
1987	6.532
1988	6.351
1989	5.767
1990	4.991
1991	5.787
1992	5.185
1993	4.801
1994	4.684
1995	4.753
1996	4.814
1997	4.842
1998	4.967
1999	5.192
2000	5.456
2001	5.751
2002	8.982
2003	-1.818
2004	-1.335
2005	7.475