Year Measure
1764 672
1765 671.8
1766 671.6
1767 671.5
1768 671.3
1769 671.1
1770 670.9
1771 670.8
1772 670.6
1773 670.4
1774 670.2
1775 670.1
1776 669.9
1777 669.7
1778 669.5
1779 669.4
1780 669.2
1781 669
1782 668.8
1783 668.7
1784 668.5
1785 668.3
1786 668.2
1787 668
1788 667.8
1789 667.6
1790 667.5
1791 667.3
1792 667.1
1793 666.9
1794 666.8
1795 666.6
1796 666.4
1797 666.2
1798 666.1
1799 665.9
1800 665.7
1801 665.6
1802 665.4
1803 665.2
1804 665
1805 664.9
1806 664.7
1807 664.5
1808 664.3
1809 664.2
1810 664
1811 663.8
1812 663.6
1813 663.5
1814 663.3
1815 663.1
1816 663
1817 662.8
1818 662.6
1819 662.4
1820 662.3
1821 662.3
1822 662.3
1823 662.3
1824 662.3
1825 662.2
1826 662.2
1827 662.2
1828 662.2
1829 662.2
1830 662.2
1831 662.2
1832 662.2
1833 662.2
1834 662.2
1835 662.2
1836 662.2
1837 662.2
1838 662.2
1839 662.2
1840 662.2
1841 662.2
1842 662.2
1843 662.2
1844 662.2
1845 662.2
1846 662.2
1847 662.2
1848 662.2
1849 662.2
1850 662.1
1851 662.2
1852 662.2
1853 662.2
1854 662.2
1855 662.2
1856 662.2
1857 662.2
1858 662.2
1859 662.2
1860 662.2
1861 662.2
1862 662.2
1863 662.3
1864 662.3
1865 662.3
1866 662.3
1867 662.3
1868 662.3
1869 662.3
1870 662.3
1871 663.8
1872 665.4
1873 666.9
1874 668.4
1875 669.9
1876 671.5
1877 673
1878 674.6
1879 676.1
1880 677.7
1881 679.2
1882 680.8
1883 682.4
1884 683.9
1885 704.1
1886 680.5
1887 710.2
1888 715.4
1889 694.7
1890 725.7
1891 657.8
1892 709.4
1893 726.1
1894 735.9
1895 716.6
1896 662.6
1897 782.3
1898 782.6
1899 720.4
1900 744.4
1901 755.1
1902 813.1
1903 819.7
1904 818.5
1905 798.8
1906 816.6
1907 762.5
1908 768.8
1909 869.2
1910 865.4
1911 858.1
1912 855.6
1913 835.5
1914 880.2
1915 858.1
1916 882.2
1917 865.5
1918 754.1
1919 857.5
1920 788.8
1921 844
1922 870.9
1923 833.9
1924 866
1925 867.5
1926 885.6
1927 877
1928 877
1929 904.1
1930 901.4
1931 883.4
1932 880.9
1933 869.4
1934 865.4
1935 845.3
1936 865.9
1937 839.9
1938 830.3
1939 836.9
1940 852.6
1941 858
1942 844.1
1943 867.3
1944 848.3
1945 824.9
1946 772.4
1947 767.2
1948 766.4
1949 775.6
1950 739.1
1951 698.4
1952 684.6
1953 732.5
1954 731.6
1955 730.5
1956 733.8
1957 747.1
1958 738.7
1959 727.9
1960 744.2
1961 769
1962 803.3
1963 831.4
1964 870.8
1965 885.8
1966 932.9
1967 942.4
1968 981.8
1969 1018
1970 1094
1971 1070
1972 1050
1973 1096
1974 1106
1975 1124
1976 1156
1977 1176
1978 1241
1979 1250
1980 1334
1981 1388
1982 1443
1983 1497
1984 1519
1985 1609
1986 1661
1987 1705
1988 1761
1989 1794
1990 1826
1991 1875
1992 1972
1993 1967
1994 1991
1995 2038
1996 2081
1997 2049
1998 2050
1999 2073
2000 2086
2001 2069
2002 2093
2003 2153
2004 2270
2005 2396
2006 2489
2007 2612
2008 2661
2009 2591
2010 2615
2011 2639
2012 2681
2013 2719
2014 2753
2015 2783
2016 2811
2017 2840
2018 2870