Year	Total
1800	4.9
1801	4.89
1802	4.88
1803	4.87
1804	4.86
1805	4.84
1806	4.83
1807	4.82
1808	4.81
1809	4.8
1810	4.79
1811	4.78
1812	4.77
1813	4.76
1814	4.74
1815	4.73
1816	4.72
1817	4.71
1818	4.7
1819	4.69
1820	4.68
1821	4.67
1822	4.66
1823	4.64
1824	4.63
1825	4.62
1826	4.61
1827	4.6
1828	4.59
1829	4.58
1830	4.57
1831	4.56
1832	4.54
1833	4.53
1834	4.52
1835	4.51
1836	4.5
1837	4.49
1838	4.48
1839	4.47
1840	4.46
1841	4.44
1842	4.43
1843	4.42
1844	4.41
1845	4.4
1846	4.39
1847	4.38
1848	4.37
1849	4.36
1850	4.34
1851	4.33
1852	4.32
1853	4.31
1854	4.3
1855	4.29
1856	4.28
1857	4.27
1858	4.26
1859	4.24
1860	4.23
1861	4.22
1862	4.21
1863	4.2
1864	4.19
1865	4.18
1866	4.22
1867	4.27
1868	4.31
1869	4.36
1870	4.4
1871	4.45
1872	4.49
1873	4.54
1874	4.58
1875	4.63
1876	4.61
1877	4.6
1878	4.58
1879	4.57
1880	4.55
1881	4.54
1882	4.52
1883	4.51
1884	4.49
1885	4.48
1886	4.51
1887	4.54
1888	4.57
1889	4.6
1890	4.63
1891	4.65
1892	4.68
1893	4.71
1894	4.74
1895	4.77
1896	4.77
1897	4.77
1898	4.77
1899	4.77
1900	4.77
1901	4.77
1902	4.77
1903	4.77
1904	4.77
1905	4.77
1906	4.78
1907	4.79
1908	4.8
1909	4.8
1910	4.81
1911	4.82
1912	4.83
1913	4.83
1914	4.84
1915	4.85
1916	4.91
1917	4.97
1918	5.04
1919	5.1
1920	5.16
1921	5.22
1922	5.28
1923	5.35
1924	5.41
1925	5.47
1926	5.51
1927	5.54
1928	5.58
1929	5.62
1930	5.65
1931	5.69
1932	5.73
1933	5.77
1934	5.8
1935	5.79
1936	5.79
1937	5.78
1938	5.77
1939	5.76
1940	5.76
1941	5.75
1942	5.74
1943	5.73
1944	5.73
1945	5.72
1946	5.71
1947	5.7
1948	5.7
1949	6.05
1950	6.93
1951	5.77
1952	5.96
1953	6.15
1954	6.31
1955	6.61
1956	6.67
1957	6.93
1958	6.82
1959	7.15
1960	7.25
1961	7.31
1962	7.09
1963	7.04
1964	7.27
1965	6.96
1966	7
1967	6.4
1968	5.85
1969	4.58
1970	3.9
1971	3.25
1972	2.77
1973	2.69
1974	2.3
1975	2.35
1976	2.26
1977	2.35
1978	2.2
1979	2.19
1980	2.44
1981	2.33
1982	2.24
1983	2.05
1984	2.11
1985	2.24
1986	2.04
1987	2.08
1988	2.32
1989	2.3
1990	2.44
1991	2.42
1992	2.61
1993	2.58
1994	2.53
1995	2.51
1996	2.49
1997	2.69
1998	2.46
1999	2.42
2000	2.33
2001	2.51
2002	2.57
2003	2.37
2004	2.42
2005	2.38
2006	2.26
2007	2.3
2008	2.25
2009	2.36
2010	2.2
2011	2.12
2012	2.02
2013	2.08