Year Measure
1800 575
1801 575
1802 575
1803 575
1804 575
1805 575
1806 575
1807 575
1808 575
1809 575
1810 575
1811 575
1812 575
1813 575
1814 575
1815 575
1816 575
1817 575
1818 575
1819 575
1820 575
1821 576.9
1822 578.7
1823 580.6
1824 582.5
1825 584.4
1826 586.3
1827 588.2
1828 590.1
1829 592
1830 593.9
1831 595.9
1832 597.8
1833 599.7
1834 601.7
1835 603.7
1836 605.6
1837 607.6
1838 609.6
1839 611.5
1840 613.5
1841 615.5
1842 617.5
1843 619.5
1844 621.5
1845 623.5
1846 625.6
1847 627.6
1848 629.6
1849 631.7
1850 633.7
1851 635.8
1852 637.9
1853 639.9
1854 642
1855 644.1
1856 646.2
1857 648.3
1858 650.4
1859 652.5
1860 654.6
1861 656.7
1862 658.9
1863 661
1864 663.2
1865 665.3
1866 667.5
1867 669.6
1868 671.8
1869 674
1870 676.2
1871 678.4
1872 680.6
1873 682.8
1874 685
1875 687.2
1876 689.5
1877 691.7
1878 694
1879 696.2
1880 698.5
1881 700.7
1882 703
1883 705.3
1884 707.6
1885 709.9
1886 712.2
1887 714.5
1888 716.8
1889 719.2
1890 721.5
1891 723.8
1892 726.2
1893 728.5
1894 730.9
1895 733.3
1896 735.7
1897 738
1898 740.4
1899 742.9
1900 745.3
1901 747.7
1902 750.1
1903 752.5
1904 755
1905 757.4
1906 759.9
1907 762.4
1908 764.8
1909 767.3
1910 769.8
1911 772.3
1912 774.8
1913 777.3
1914 782.1
1915 786.8
1916 791.6
1917 796.4
1918 801.2
1919 806.1
1920 811
1921 815.9
1922 820.9
1923 825.9
1924 830.9
1925 835.9
1926 841
1927 846.1
1928 851.2
1929 856.4
1930 861.6
1931 866.8
1932 872.1
1933 877.4
1934 882.7
1935 888.1
1936 893.5
1937 898.9
1938 904.4
1939 909.9
1940 915.4
1941 920.9
1942 926.5
1943 932.2
1944 937.8
1945 943.5
1946 949.2
1947 955
1948 960.8
1949 966.6
1950 972.5
1951 986.6
1952 1001
1953 1016
1954 1030
1955 1045
1956 1060
1957 1076
1958 1091
1959 1107
1960 1123
1961 1172
1962 1224
1963 1249
1964 1330
1965 1437
1966 1489
1967 1516
1968 1548
1969 1639
1970 1776
1971 1845
1972 1904
1973 1982
1974 1987
1975 1926
1976 1820
1977 1797
1978 1909
1979 1902
1980 1815
1981 1766
1982 1728
1983 1738
1984 1687
1985 1709
1986 1744
1987 1748
1988 1753
1989 1685
1990 1593
1991 1701
1992 1887
1993 2173
1994 2242
1995 2110
1996 2213
1997 2070
1998 1939
1999 1923
2000 1827
2001 1779
2002 1732
2003 1728
2004 1734
2005 1752
2006 1751
2007 1833
2008 1910
2009 1982
2010 2080
2011 2254
2012 2378
2013 2426
2014 2510
2015 2978
2016 3001
2017 3027
2018 3055
2019 3092