Year	Total
1800	4.97
1801	4.6
1802	5.3
1803	5.61
1804	5.65
1805	5.55
1806	5.49
1807	5.45
1808	5.4
1809	5.24
1810	5.36
1811	5.43
1812	5.31
1813	5.45
1814	5.46
1815	6.02
1816	5.73
1817	5.69
1818	5.54
1819	5.45
1820	5.4
1821	5.55
1822	5.69
1823	5.54
1824	5.42
1825	5.38
1826	5.36
1827	5.07
1828	5.23
1829	4.85
1830	4.83
1831	4.78
1832	4.78
1833	5
1834	4.89
1835	4.83
1836	4.86
1837	4.79
1838	4.78
1839	4.93
1840	4.9
1841	4.89
1842	4.83
1843	4.82
1844	4.83
1845	4.75
1846	4.9
1847	4.58
1848	4.71
1849	4.78
1850	4.85
1851	4.94
1852	4.94
1853	4.78
1854	4.89
1855	4.85
1856	4.94
1857	4.9
1858	4.79
1859	4.97
1860	4.86
1861	4.88
1862	4.92
1863	4.94
1864	4.96
1865	4.94
1866	4.92
1867	4.94
1868	4.97
1869	4.82
1870	4.88
1871	4.85
1872	4.89
1873	4.94
1874	4.93
1875	4.92
1876	4.9
1877	4.89
1878	4.88
1879	4.81
1880	4.75
1881	4.68
1882	4.62
1883	4.55
1884	4.47
1885	4.39
1886	4.32
1887	4.24
1888	4.16
1889	4.11
1890	4.06
1891	4
1892	3.95
1893	3.9
1894	3.84
1895	3.79
1896	3.73
1897	3.68
1898	3.62
1899	3.58
1900	3.53
1901	3.49
1902	3.44
1903	3.4
1904	3.35
1905	3.3
1906	3.24
1907	3.19
1908	3.14
1909	3.07
1910	2.99
1911	2.92
1912	2.9
1913	2.93
1914	2.88
1915	2.59
1916	2.6
1917	2.1
1918	2.03
1919	2.31
1920	3.08
1921	2.69
1922	2.44
1923	2.38
1924	2.28
1925	2.2
1926	2.15
1927	2.01
1928	2.01
1929	1.95
1930	1.95
1931	1.89
1932	1.83
1933	1.72
1934	1.76
1935	1.75
1936	1.77
1937	1.79
1938	1.84
1939	1.84
1940	1.74
1941	1.72
1942	1.93
1943	2.03
1944	2.25
1945	2.05
1946	2.47
1947	2.7
1948	2.39
1949	2.26
1950	2.08
1951	2.1
1952	2.15
1953	2.2
1954	2.26
1955	2.33
1956	2.4
1957	2.48
1958	2.55
1959	2.63
1960	2.69
1961	2.75
1962	2.79
1963	2.8
1964	2.79
1965	2.76
1966	2.7
1967	2.61
1968	2.52
1969	2.41
1970	2.29
1971	2.18
1972	2.07
1973	1.98
1974	1.89
1975	1.83
1976	1.78
1977	1.74
1978	1.73
1979	1.72
1980	1.73
1981	1.74
1982	1.76
1983	1.78
1984	1.8
1985	1.81
1986	1.82
1987	1.83
1988	1.83
1989	1.82
1990	1.81
1991	1.8
1992	1.79
1993	1.78
1994	1.77
1995	1.76
1996	1.74
1997	1.73
1998	1.71
1999	1.69
2000	1.68
2001	1.67
2002	1.67
2003	1.69
2004	1.72
2005	1.76
2006	1.8
2007	1.84
2008	1.86
2009	1.88
2010	1.89
2011	1.89
2012	1.89
2013	1.88
2014	1.88
2015	1.88
2016	1.87
2017	1.87
2018	1.87