Year Measure
1800 697
1801 697
1802 697
1803 697
1804 697
1805 697
1806 697
1807 697
1808 697
1809 697
1810 697
1811 697
1812 697
1813 697
1814 697
1815 697
1816 697
1817 697
1818 697
1819 697
1820 697
1821 697
1822 697
1823 697
1824 697
1825 697
1826 697
1827 697
1828 697
1829 697
1830 697
1831 697
1832 697
1833 697
1834 697
1835 697
1836 697
1837 697
1838 697
1839 697
1840 697
1841 697
1842 697
1843 697
1844 697
1845 697
1846 697
1847 697
1848 697
1849 697
1850 697
1851 697
1852 697
1853 696.9
1854 696.9
1855 696.9
1856 696.9
1857 696.9
1858 696.9
1859 696.9
1860 696.9
1861 696.9
1862 696.9
1863 696.9
1864 696.9
1865 696.9
1866 696.9
1867 696.9
1868 696.9
1869 696.9
1870 696.9
1871 701.9
1872 706.9
1873 711.9
1874 717
1875 722.1
1876 727.3
1877 732.5
1878 737.7
1879 742.9
1880 748.2
1881 753.6
1882 759
1883 764.4
1884 769.8
1885 775.3
1886 780.9
1887 786.4
1888 792
1889 797.7
1890 803.4
1891 809.1
1892 814.9
1893 820.7
1894 826.5
1895 832.4
1896 838.4
1897 844.4
1898 850.4
1899 856.5
1900 862.6
1901 868.7
1902 874.9
1903 881.2
1904 887.4
1905 893.8
1906 900.2
1907 906.6
1908 913
1909 919.6
1910 926.1
1911 932.7
1912 939.4
1913 946.1
1914 944
1915 941.9
1916 939.8
1917 937.7
1918 935.6
1919 933.5
1920 931.5
1921 929.4
1922 927.3
1923 925.3
1924 923.2
1925 921.2
1926 919.1
1927 917.1
1928 915
1929 913
1930 911
1931 908.9
1932 906.9
1933 904.9
1934 902.9
1935 900.9
1936 898.9
1937 896.9
1938 894.9
1939 892.9
1940 890.9
1941 888.9
1942 887
1943 885
1944 883
1945 881.1
1946 879.1
1947 877.2
1948 875.2
1949 873.3
1950 871.3
1951 887.1
1952 907.7
1953 953
1954 963
1955 971.9
1956 1005
1957 994.3
1958 1039
1959 1056
1960 1066
1961 1076
1962 1085
1963 1093
1964 1100
1965 1107
1966 1164
1967 1125
1968 1112
1969 1140
1970 1147
1971 1111
1972 1122
1973 1092
1974 1136
1975 1126
1976 1148
1977 1154
1978 1176
1979 1174
1980 1118
1981 1090
1982 1195
1983 1131
1984 1209
1985 1251
1986 1272
1987 1290
1988 1357
1989 1353
1990 1418
1991 1471
1992 1493
1993 1512
1994 1596
1995 1611
1996 1655
1997 1681
1998 1672
1999 1686
2000 1754
2001 1804
2002 1758
2003 1772
2004 1795
2005 1798
2006 1792
2007 1818
2008 1894
2009 1944
2010 2002
2011 2044
2012 2118
2013 2160
2014 2223
2015 2288
2016 2357
2017 2438
2018 2521
2019 2609