Year	Measure
1800	820.4
1801	820.4
1802	820.4
1803	820.4
1804	820.4
1805	820.4
1806	820.4
1807	820.4
1808	820.4
1809	820.4
1810	820.4
1811	820.4
1812	820.4
1813	820.4
1814	820.4
1815	820.4
1816	820.4
1817	820.4
1818	820.4
1819	820.4
1820	820.4
1821	822.4
1822	824.5
1823	826.5
1824	828.6
1825	830.6
1826	832.7
1827	834.8
1828	836.9
1829	838.9
1830	841
1831	843.1
1832	845.2
1833	847.3
1834	849.4
1835	851.5
1836	853.6
1837	855.8
1838	857.9
1839	860
1840	862.2
1841	864.3
1842	866.5
1843	868.6
1844	870.8
1845	872.9
1846	875.1
1847	877.3
1848	879.5
1849	881.7
1850	883.9
1851	886.1
1852	888.3
1853	890.5
1854	892.7
1855	894.9
1856	897.1
1857	899.4
1858	901.6
1859	903.8
1860	906.1
1861	908.3
1862	910.6
1863	912.9
1864	915.1
1865	917.4
1866	919.7
1867	922
1868	924.3
1869	926.6
1870	928.9
1871	931.2
1872	933.5
1873	935.8
1874	938.1
1875	940.5
1876	942.8
1877	945.2
1878	947.5
1879	949.9
1880	952.2
1881	954.6
1882	957
1883	959.4
1884	961.7
1885	964.1
1886	966.5
1887	968.9
1888	971.3
1889	973.8
1890	976.2
1891	978.6
1892	981
1893	983.5
1894	985.9
1895	988.4
1896	990.8
1897	1070
1898	1125
1899	1172
1900	1219
1901	1292
1902	1346
1903	1419
1904	1449
1905	1535
1906	1637
1907	1718
1908	1729
1909	1736
1910	1744
1911	1759
1912	1798
1913	1835
1914	1801
1915	1932
1916	2106
1917	2156
1918	2142
1919	2186
1920	2180
1921	2235
1922	2390
1923	2515
1924	2709
1925	2738
1926	2969
1927	2976
1928	3119
1929	3391
1930	2956
1931	2674
1932	2530
1933	2770
1934	3094
1935	3330
1936	3434
1937	3424
1938	3422
1939	3386
1940	3397
1941	3343
1942	3212
1943	3207
1944	3424
1945	3491
1946	3565
1947	3603
1948	3660
1949	3870
1950	4102
1951	4312
1952	4422
1953	4584
1954	4592
1955	4805
1956	4891
1957	4995
1958	4876
1959	4769
1960	5278
1961	5586
1962	5832
1963	5928
1964	6160
1965	6389
1966	6735
1967	6810
1968	6552
1969	6536
1970	6852
1971	6961
1972	6986
1973	7152
1974	7323
1975	7691
1976	7592
1977	7390
1978	7198
1979	7432
1980	7578
1981	7720
1982	7570
1983	6415
1984	6563
1985	6545
1986	7045
1987	7484
1988	6723
1989	5778
1990	5370
1991	5390
1992	5231
1993	5416
1994	6028
1995	6417
1996	6440
1997	6869
1998	6760
1999	6712
2000	6814
2001	6724
2002	6952
2003	7124
2004	7249
2005	7607
2006	8071
2007	8609
2008	9309
2009	9246
2010	9906
2011	10430
2012	10920
2013	11290
2014	11730
2015	12220
2016	12730
2017	13270
2018	13820
2019	14400