Year	Measure
1800	410.8
1801	410.8
1802	410.8
1803	410.8
1804	410.8
1805	410.8
1806	410.8
1807	410.8
1808	410.8
1809	410.8
1810	410.8
1811	410.8
1812	410.8
1813	410.8
1814	410.8
1815	410.8
1816	410.8
1817	410.8
1818	410.8
1819	410.8
1820	410.8
1821	410.8
1822	410.8
1823	410.8
1824	410.8
1825	410.8
1826	410.8
1827	410.8
1828	410.8
1829	410.8
1830	410.8
1831	410.8
1832	410.8
1833	410.8
1834	410.8
1835	410.8
1836	410.8
1837	410.8
1838	410.8
1839	410.8
1840	410.8
1841	410.8
1842	410.8
1843	410.8
1844	410.8
1845	410.8
1846	410.8
1847	410.8
1848	410.8
1849	410.8
1850	410.8
1851	410.8
1852	410.8
1853	410.8
1854	410.8
1855	410.8
1856	410.8
1857	410.8
1858	410.8
1859	410.8
1860	410.8
1861	410.8
1862	410.8
1863	410.8
1864	410.8
1865	410.8
1866	410.8
1867	410.8
1868	410.8
1869	410.8
1870	410.8
1871	410.8
1872	410.8
1873	410.8
1874	410.8
1875	410.8
1876	410.8
1877	410.8
1878	410.8
1879	410.8
1880	410.8
1881	410.8
1882	410.8
1883	410.8
1884	410.8
1885	410.8
1886	410.8
1887	410.8
1888	410.8
1889	410.8
1890	410.8
1891	410.8
1892	410.8
1893	410.8
1894	410.8
1895	410.8
1896	410.8
1897	410.8
1898	410.8
1899	410.8
1900	410.8
1901	412.4
1902	414.1
1903	415.7
1904	417.4
1905	419
1906	420.7
1907	422.4
1908	424.1
1909	425.7
1910	427.4
1911	429.1
1912	430.8
1913	432.6
1914	434.3
1915	436
1916	437.7
1917	439.5
1918	441.2
1919	443
1920	444.7
1921	446.5
1922	448.3
1923	450.1
1924	451.9
1925	453.7
1926	455.5
1927	457.3
1928	459.1
1929	460.9
1930	462.7
1931	464.6
1932	466.4
1933	468.3
1934	470.2
1935	472
1936	473.9
1937	475.8
1938	477.7
1939	479.6
1940	481.5
1941	483.4
1942	485.3
1943	487.2
1944	489.2
1945	491.1
1946	493.1
1947	495
1948	497
1949	499
1950	501
1951	536.9
1952	575.5
1953	616.8
1954	661
1955	708.5
1956	759.3
1957	813.8
1958	872.3
1959	934.9
1960	1002
1961	1138
1962	1291
1963	1466
1964	1665
1965	1890
1966	1790
1967	2134
1968	2252
1969	2506
1970	3018
1971	3728
1972	3948
1973	5295
1974	11510
1975	11360
1976	13520
1977	12760
1978	13860
1979	14890
1980	16740
1981	16570
1982	14770
1983	15820
1984	15110
1985	13510
1986	10560
1987	9438
1988	8629
1989	11300
1990	10940
1991	11410
1992	10550
1993	10150
1994	10600
1995	10580
1996	11460
1997	9352
1998	7909
1999	8569
2000	10370
2001	9583
2002	9271
2003	9956
2004	11110
2005	14890
2006	14770
2007	14720
2008	17360
2009	15670
2010	19240
2011	17490
2012	18190
2013	18990
2014	19790
2015	20740
2016	21840
2017	22860
2018	23920
2019	24970