Year	Total
1800	5.11
1801	5.11
1802	5.11
1803	5.11
1804	5.11
1805	5.11
1806	5.11
1807	5.11
1808	5.11
1809	5.11
1810	5.11
1811	5.11
1812	5.11
1813	5.11
1814	5.11
1815	5.11
1816	5.11
1817	5.11
1818	5.11
1819	5.11
1820	5.11
1821	5.11
1822	5.11
1823	5.11
1824	5.11
1825	5.11
1826	5.11
1827	5.11
1828	5.11
1829	5.11
1830	5.11
1831	5.11
1832	5.11
1833	5.11
1834	5.11
1835	5.11
1836	5.11
1837	5.11
1838	5.11
1839	5.11
1840	5.11
1841	5.09
1842	5.06
1843	5.04
1844	5.02
1845	4.99
1846	4.99
1847	4.99
1848	4.99
1849	4.99
1850	4.89
1851	4.8
1852	4.7
1853	4.6
1854	4.6
1855	4.6
1856	4.6
1857	4.6
1858	4.6
1859	4.68
1860	4.75
1861	4.83
1862	4.9
1863	4.98
1864	4.99
1865	5.01
1866	5.02
1867	5.04
1868	5.05
1869	5.09
1870	5.12
1871	5.16
1872	5.19
1873	5.23
1874	5.27
1875	5.31
1876	5.34
1877	5.38
1878	5.42
1879	5.39
1880	5.35
1881	5.32
1882	5.28
1883	5.25
1884	5.23
1885	5.21
1886	5.18
1887	5.16
1888	5.14
1889	5.11
1890	5.07
1891	5.04
1892	5
1893	4.97
1894	4.93
1895	4.88
1896	4.84
1897	4.79
1898	4.75
1899	4.6
1900	4.45
1901	4.53
1902	4.46
1903	4.42
1904	4.38
1905	4.29
1906	4.23
1907	4.18
1908	4.13
1909	4.04
1910	3.94
1911	3.81
1912	3.84
1913	3.85
1914	3.86
1915	3.59
1916	3.64
1917	3.59
1918	3.47
1919	3.36
1920	3.89
1921	3.75
1922	3.54
1923	3.55
1924	3.39
1925	3.26
1926	3.18
1927	3.08
1928	3.09
1929	3
1930	3.03
1931	2.88
1932	2.83
1933	2.66
1934	2.63
1935	2.57
1936	2.51
1937	2.53
1938	2.63
1939	2.64
1940	2.67
1941	2.61
1942	2.71
1943	2.98
1944	3.13
1945	2.96
1946	3.97
1947	3.7
1948	3.41
1949	3.22
1950	3.1
1951	3.05
1952	3.09
1953	3.03
1954	3.03
1955	3.03
1956	3.05
1957	3.08
1958	3.11
1959	3.17
1960	3.12
1961	3.22
1962	3.18
1963	3.19
1964	3.17
1965	3.04
1966	2.9
1967	2.81
1968	2.72
1969	2.75
1970	2.57
1971	2.36
1972	2.15
1973	1.9
1974	1.77
1975	1.66
1976	1.63
1977	1.58
1978	1.58
1979	1.56
1980	1.6
1981	1.56
1982	1.5
1983	1.47
1984	1.49
1985	1.51
1986	1.55
1987	1.56
1988	1.55
1989	1.55
1990	1.62
1991	1.61
1992	1.59
1993	1.57
1994	1.57
1995	1.53
1996	1.53
1997	1.56
1998	1.63
1999	1.65
2000	1.72
2001	1.71
2002	1.73
2003	1.75
2004	1.73
2005	1.71
2006	1.72
2007	1.72
2008	1.77
2009	1.79
2010	1.8
2011	1.76
2012	1.76
2013	1.77
2014	1.76
2015	1.75
2016	1.74
2017	1.75
2018	1.75