Year Measure
1800 818
1801 818
1802 818
1803 818
1804 818
1805 818
1806 818
1807 818
1808 818
1809 818
1810 818
1811 818
1812 818
1813 818
1814 818
1815 818
1816 818
1817 818
1818 818
1819 818
1820 818
1821 818.6
1822 819.1
1823 819.6
1824 820.2
1825 820.7
1826 821.3
1827 821.8
1828 822.4
1829 822.9
1830 823.4
1831 824
1832 824.5
1833 825.1
1834 825.6
1835 826.2
1836 826.7
1837 827.3
1838 827.8
1839 828.4
1840 828.9
1841 829.5
1842 830
1843 830.6
1844 831.1
1845 831.6
1846 832.2
1847 832.7
1848 833.3
1849 833.9
1850 834.4
1851 835
1852 835.5
1853 836.1
1854 836.6
1855 837.2
1856 837.7
1857 838.3
1858 838.8
1859 839.4
1860 839.9
1861 840.5
1862 841
1863 841.6
1864 842.2
1865 842.7
1866 843.3
1867 843.8
1868 844.4
1869 844.9
1870 845.5
1871 846.1
1872 846.6
1873 847.2
1874 847.7
1875 848.3
1876 848.9
1877 849.4
1878 850
1879 850.5
1880 851.1
1881 851.7
1882 852.2
1883 852.8
1884 853.4
1885 853.9
1886 854.5
1887 855.1
1888 855.6
1889 856.2
1890 856.8
1891 857.3
1892 857.9
1893 858.5
1894 859
1895 859.6
1896 860.2
1897 860.7
1898 861.3
1899 861.9
1900 862.4
1901 863
1902 863.6
1903 864.1
1904 864.7
1905 865.3
1906 865.9
1907 866.4
1908 867
1909 867.6
1910 868.2
1911 868.7
1912 869.3
1913 869.9
1914 870.4
1915 871
1916 871.6
1917 872.2
1918 872.8
1919 873.3
1920 873.9
1921 874.5
1922 875.1
1923 875.6
1924 876.2
1925 876.8
1926 877.4
1927 878
1928 878.5
1929 879.1
1930 879.7
1931 880.3
1932 880.9
1933 881.4
1934 882
1935 882.6
1936 883.2
1937 883.8
1938 884.4
1939 884.9
1940 885.5
1941 886.1
1942 886.7
1943 887.3
1944 887.9
1945 888.5
1946 889.1
1947 889.6
1948 890.2
1949 890.8
1950 891.4
1951 926.7
1952 962.4
1953 1001
1954 1175
1955 1102
1956 1225
1957 1274
1958 1282
1959 1267
1960 1305
1961 1363
1962 1416
1963 1444
1964 1563
1965 1641
1966 1715
1967 1785
1968 1809
1969 1865
1970 1919
1971 1835
1972 1945
1973 1942
1974 2009
1975 2037
1976 1986
1977 1813
1978 2016
1979 2021
1980 1661
1981 1918
1982 1987
1983 1784
1984 1815
1985 1871
1986 1814
1987 1746
1988 1773
1989 1741
1990 1755
1991 1801
1992 1768
1993 1749
1994 1754
1995 1788
1996 1832
1997 1889
1998 1326
1999 1401
2000 1499
2001 1469
2002 1365
2003 1330
2004 1333
2005 1349
2006 1351
2007 1366
2008 1381
2009 1393
2010 1412
2011 1457
2012 1406
2013 1381
2014 1393
2015 1417
2016 1444
2017 1473
2018 1502
2019 1534