Year	Total
1800	7.03
1801	7.01
1802	6.99
1803	6.96
1804	6.94
1805	6.92
1806	6.9
1807	6.87
1808	6.85
1809	6.83
1810	6.81
1811	6.79
1812	6.76
1813	6.74
1814	6.72
1815	6.7
1816	6.67
1817	6.65
1818	6.63
1819	6.61
1820	6.59
1821	6.57
1822	6.54
1823	6.52
1824	6.5
1825	6.48
1826	6.46
1827	6.44
1828	6.42
1829	6.4
1830	6.38
1831	6.36
1832	6.34
1833	6.32
1834	6.3
1835	6.28
1836	6.26
1837	6.24
1838	6.22
1839	6.2
1840	6.18
1841	6.14
1842	6.09
1843	6.05
1844	6
1845	5.96
1846	5.91
1847	5.87
1848	5.82
1849	5.78
1850	5.73
1851	5.69
1852	5.64
1853	5.6
1854	5.55
1855	5.51
1856	5.46
1857	5.42
1858	5.37
1859	5.33
1860	5.28
1861	5.26
1862	5.23
1863	5.2
1864	5.18
1865	5.15
1866	5.12
1867	5.1
1868	5.07
1869	5.04
1870	5.02
1871	4.99
1872	4.96
1873	4.94
1874	4.91
1875	4.88
1876	4.86
1877	4.83
1878	4.8
1879	4.77
1880	4.75
1881	4.7
1882	4.66
1883	4.61
1884	4.57
1885	4.52
1886	4.48
1887	4.43
1888	4.39
1889	4.35
1890	4.3
1891	4.26
1892	4.21
1893	4.17
1894	4.12
1895	4.08
1896	4.03
1897	3.99
1898	3.94
1899	3.9
1900	3.85
1901	3.85
1902	3.84
1903	3.83
1904	3.79
1905	3.75
1906	3.71
1907	3.67
1908	3.63
1909	3.58
1910	3.59
1911	3.57
1912	3.56
1913	3.45
1914	3.57
1915	3.52
1916	3.47
1917	3.33
1918	3.31
1919	3.07
1920	3.26
1921	3.33
1922	3.11
1923	3.1
1924	3.12
1925	3.01
1926	2.9
1927	2.82
1928	2.66
1929	2.53
1930	2.53
1931	2.4
1932	2.32
1933	2.01
1934	2.07
1935	2.04
1936	2.01
1937	2.04
1938	2.09
1939	2.05
1940	2.11
1941	2.23
1942	2.47
1943	2.57
1944	2.44
1945	2.38
1946	2.83
1947	3.16
1948	3.01
1949	3.02
1950	3.02
1951	3.2
1952	3.3
1953	3.37
1954	3.49
1955	3.54
1956	3.65
1957	3.74
1958	3.69
1959	3.69
1960	3.67
1961	3.63
1962	3.48
1963	3.35
1964	3.22
1965	2.93
1966	2.71
1967	2.56
1968	2.47
1969	2.46
1970	2.46
1971	2.27
1972	2.01
1973	1.87
1974	1.83
1975	1.77
1976	1.74
1977	1.78
1978	1.75
1979	1.8
1980	1.82
1981	1.81
1982	1.81
1983	1.78
1984	1.79
1985	1.84
1986	1.84
1987	1.87
1988	1.92
1989	2
1990	2.07
1991	2.06
1992	2.04
1993	2.02
1994	2
1995	1.98
1996	1.98
1997	1.97
1998	2
1999	2.01
2000	2.05
2001	2.03
2002	2.02
2003	2.05
2004	2.06
2005	2.06
2006	2.11
2007	2.12
2008	2.07
2009	2
2010	1.93
2011	1.9
2012	1.9
2013	1.96
2014	1.95
2015	1.93
2016	1.92
2017	1.91
2018	1.9