Year Measure
1800 838.8
1801 838.8
1802 838.8
1803 838.8
1804 838.8
1805 838.8
1806 838.8
1807 838.8
1808 838.8
1809 838.8
1810 838.8
1811 838.8
1812 838.8
1813 838.8
1814 838.8
1815 838.8
1816 838.8
1817 838.8
1818 838.8
1819 838.8
1820 838.8
1821 841
1822 843.1
1823 845.2
1824 847.4
1825 849.5
1826 851.7
1827 853.8
1828 856
1829 858.2
1830 860.3
1831 862.5
1832 864.7
1833 866.9
1834 869.1
1835 871.3
1836 873.5
1837 875.7
1838 878
1839 880.2
1840 882.4
1841 884.7
1842 886.9
1843 889.2
1844 891.4
1845 893.7
1846 895.9
1847 898.2
1848 900.5
1849 902.8
1850 905.1
1851 907.4
1852 909.7
1853 912
1854 914.3
1855 916.6
1856 918.9
1857 921.3
1858 923.6
1859 925.9
1860 928.3
1861 930.6
1862 933
1863 935.4
1864 937.7
1865 940.1
1866 942.5
1867 944.9
1868 947.3
1869 949.7
1870 952.1
1871 954.5
1872 956.9
1873 959.4
1874 961.8
1875 964.2
1876 966.7
1877 969.1
1878 971.6
1879 974.1
1880 976.5
1881 979
1882 981.5
1883 984
1884 986.5
1885 989
1886 991.5
1887 994
1888 996.5
1889 999
1890 1002
1891 1004
1892 1007
1893 1009
1894 1012
1895 1014
1896 1017
1897 1019
1898 1022
1899 1025
1900 1027
1901 1030
1902 1032
1903 1035
1904 1038
1905 1040
1906 1043
1907 1046
1908 1048
1909 1051
1910 1054
1911 1056
1912 1059
1913 1062
1914 1064
1915 1067
1916 1070
1917 1072
1918 1075
1919 1078
1920 1081
1921 1083
1922 1086
1923 1089
1924 1092
1925 1094
1926 1097
1927 1100
1928 1115
1929 1130
1930 1146
1931 1161
1932 1177
1933 1193
1934 1209
1935 1226
1936 1242
1937 1259
1938 1276
1939 1294
1940 1311
1941 1329
1942 1347
1943 1366
1944 1384
1945 1403
1946 1422
1947 1442
1948 1461
1949 1481
1950 1501
1951 1551
1952 1561
1953 1584
1954 1633
1955 1645
1956 1665
1957 1685
1958 1689
1959 1741
1960 1750
1961 1745
1962 1720
1963 1714
1964 1752
1965 1780
1966 1862
1967 1929
1968 1962
1969 2044
1970 2117
1971 2163
1972 2180
1973 2201
1974 2212
1975 2065
1976 2103
1977 2063
1978 2120
1979 2155
1980 1956
1981 1817
1982 1786
1983 1670
1984 1620
1985 1564
1986 1539
1987 1573
1988 1634
1989 1703
1990 846.8
1991 738.7
1992 488.2
1993 331
1994 257.8
1995 240.4
1996 256.1
1997 493.3
1998 594.2
1999 684.7
2000 797.6
2001 794.8
2002 808.4
2003 550.2
2004 554.4
2005 567.4
2006 618.7
2007 640.3
2008 657.6
2009 675.8
2010 696.1
2011 729
2012 769.5
2013 809.8
2014 844.3
2015 894.7
2016 941.3
2017 989.5
2018 1039
2019 1090