Year	Total
1800	4.96
1801	4.93
1802	4.9
1803	4.87
1804	4.84
1805	4.82
1806	4.79
1807	4.76
1808	4.73
1809	4.7
1810	4.68
1811	4.65
1812	4.62
1813	4.59
1814	4.56
1815	4.53
1816	4.51
1817	4.48
1818	4.45
1819	4.51
1820	4.58
1821	4.64
1822	4.7
1823	4.77
1824	4.83
1825	4.89
1826	4.96
1827	5.02
1828	5.08
1829	5.15
1830	5.21
1831	5.27
1832	5.34
1833	5.4
1834	5.4
1835	5.39
1836	5.39
1837	5.38
1838	5.38
1839	5.37
1840	5.37
1841	5.36
1842	5.36
1843	5.35
1844	5.35
1845	5.34
1846	5.34
1847	5.33
1848	5.33
1849	5.32
1850	5.32
1851	5.31
1852	5.31
1853	5.3
1854	5.3
1855	5.29
1856	5.29
1857	5.28
1858	5.28
1859	5.27
1860	5.27
1861	5.26
1862	5.26
1863	5.25
1864	5.25
1865	5.24
1866	5.24
1867	5.23
1868	5.23
1869	5.22
1870	5.22
1871	5.21
1872	5.21
1873	5.2
1874	5.2
1875	5.19
1876	5.18
1877	5.18
1878	5.17
1879	5.17
1880	5.16
1881	5.16
1882	5.15
1883	5.15
1884	5.14
1885	5.14
1886	5.13
1887	5.13
1888	5.12
1889	5.12
1890	5.11
1891	5.11
1892	5.1
1893	5.1
1894	5.09
1895	5.09
1896	5.08
1897	5.08
1898	5.07
1899	5.07
1900	5.06
1901	5.06
1902	5.05
1903	5.05
1904	5.04
1905	5.04
1906	5.03
1907	5.03
1908	5.02
1909	5.02
1910	5.01
1911	5.01
1912	5
1913	5
1914	4.99
1915	4.99
1916	4.98
1917	4.99
1918	5
1919	5.01
1920	5.03
1921	4.96
1922	4.89
1923	4.82
1924	4.75
1925	4.68
1926	4.62
1927	4.56
1928	4.5
1929	4.44
1930	4.38
1931	4.35
1932	4.32
1933	4.29
1934	4.26
1935	4.23
1936	4.26
1937	4.28
1938	4.3
1939	4.32
1940	4.34
1941	4.34
1942	4.34
1943	4.33
1944	4.33
1945	4.33
1946	4.37
1947	4.4
1948	4.44
1949	4.48
1950	4.52
1951	4.49
1952	4.43
1953	4.39
1954	4.36
1955	4.34
1956	4.33
1957	4.33
1958	4.33
1959	4.34
1960	4.33
1961	4.31
1962	4.27
1963	4.2
1964	4.09
1965	3.96
1966	3.81
1967	3.64
1968	3.46
1969	3.28
1970	3.11
1971	2.95
1972	2.79
1973	2.65
1974	2.51
1975	2.39
1976	2.29
1977	2.2
1978	2.12
1979	2.06
1980	2
1981	1.96
1982	1.92
1983	1.89
1984	1.86
1985	1.83
1986	1.81
1987	1.78
1988	1.77
1989	1.75
1990	1.74
1991	1.73
1992	1.73
1993	1.73
1994	1.73
1995	1.73
1996	1.73
1997	1.74
1998	1.74
1999	1.74
2000	1.74
2001	1.75
2002	1.75
2003	1.75
2004	1.76
2005	1.76
2006	1.76
2007	1.77
2008	1.77
2009	1.78
2010	1.78
2011	1.79
2012	1.79
2013	1.79
2014	1.79
2015	1.8
2016	1.8
2017	1.8
2018	1.8