Year	Measure
1800	951
1801	951
1802	951
1803	951
1804	951
1805	951
1806	951
1807	951
1808	951
1809	951
1810	951
1811	951
1812	951
1813	951
1814	951
1815	951
1816	951
1817	951
1818	951
1819	951
1820	951
1821	952.3
1822	953.5
1823	954.8
1824	956.1
1825	957.3
1826	958.6
1827	959.9
1828	961.2
1829	962.5
1830	963.7
1831	965
1832	966.3
1833	967.6
1834	968.9
1835	970.2
1836	971.4
1837	972.7
1838	974
1839	975.3
1840	976.6
1841	977.9
1842	979.2
1843	980.5
1844	981.8
1845	983.1
1846	984.4
1847	985.7
1848	987.1
1849	988.4
1850	989.7
1851	991
1852	992.3
1853	993.6
1854	995
1855	996.3
1856	997.6
1857	998.9
1858	1000
1859	1002
1860	1003
1861	1004
1862	1006
1863	1007
1864	1008
1865	1010
1866	1011
1867	1012
1868	1014
1869	1015
1870	1016
1871	1018
1872	1019
1873	1020
1874	1022
1875	1023
1876	1024
1877	1026
1878	1027
1879	1029
1880	1030
1881	1031
1882	1033
1883	1034
1884	1035
1885	1037
1886	1038
1887	1040
1888	1041
1889	1042
1890	1044
1891	1045
1892	1046
1893	1048
1894	1049
1895	1051
1896	1052
1897	1053
1898	1055
1899	1056
1900	1058
1901	1059
1902	1060
1903	1062
1904	1063
1905	1065
1906	1066
1907	1068
1908	1069
1909	1070
1910	1072
1911	1073
1912	1075
1913	1076
1914	1078
1915	1079
1916	1080
1917	1082
1918	1083
1919	1085
1920	1086
1921	1088
1922	1089
1923	1090
1924	1092
1925	1093
1926	1095
1927	1096
1928	1098
1929	1099
1930	1101
1931	1102
1932	1104
1933	1105
1934	1107
1935	1108
1936	1109
1937	1111
1938	1112
1939	1114
1940	1115
1941	1117
1942	1118
1943	1120
1944	1121
1945	1123
1946	1124
1947	1126
1948	1127
1949	1129
1950	1130
1951	1141
1952	1183
1953	1166
1954	1271
1955	1214
1956	1340
1957	1394
1958	1426
1959	1524
1960	1572
1961	1516
1962	1596
1963	1669
1964	1580
1965	1612
1966	1641
1967	1681
1968	1712
1969	1694
1970	1676
1971	1570
1972	1469
1973	1184
1974	1122
1975	1117
1976	1137
1977	994.5
1978	1022
1979	907.4
1980	855
1981	837.1
1982	806.1
1983	804.8
1984	804.5
1985	801
1986	805.8
1987	936.4
1988	1011
1989	1043
1990	1013
1991	1074
1992	1115
1993	1021
1994	1075
1995	1145
1996	1080
1997	1132
1998	1132
1999	1255
2000	1319
2001	1406
2002	1531
2003	1633
2004	1757
2005	1951
2006	2111
2007	2300
2008	2414
2009	2376
2010	2496
2011	2646
2012	2811
2013	2979
2014	3163
2015	3361
2016	3570
2017	3801
2018	4044
2019	4304