Year Measure
1800 540.7
1801 540.7
1802 540.7
1803 540.7
1804 540.7
1805 540.7
1806 540.7
1807 540.7
1808 540.7
1809 540.7
1810 540.7
1811 540.7
1812 540.7
1813 540.7
1814 540.7
1815 540.7
1816 540.7
1817 540.7
1818 540.7
1819 540.7
1820 540.7
1821 542.7
1822 544.7
1823 546.8
1824 548.8
1825 550.8
1826 552.9
1827 554.9
1828 557
1829 559
1830 561.1
1831 563.2
1832 565.3
1833 567.4
1834 569.5
1835 571.6
1836 573.7
1837 575.8
1838 578
1839 580.1
1840 582.2
1841 584.4
1842 586.6
1843 588.7
1844 590.9
1845 593.1
1846 595.3
1847 597.5
1848 599.7
1849 602
1850 604.2
1851 606.4
1852 608.7
1853 610.9
1854 613.2
1855 615.5
1856 617.8
1857 620
1858 622.3
1859 624.7
1860 627
1861 629.3
1862 631.6
1863 634
1864 636.3
1865 638.7
1866 641
1867 643.4
1868 645.8
1869 648.2
1870 650.6
1871 653
1872 655.4
1873 657.9
1874 660.3
1875 662.8
1876 665.2
1877 667.7
1878 670.1
1879 672.6
1880 675.1
1881 677.6
1882 680.1
1883 682.7
1884 685.2
1885 687.7
1886 659.7
1887 769.6
1888 738.7
1889 685.3
1890 681
1891 622.4
1892 679.8
1893 768.7
1894 872
1895 805.1
1896 884.8
1897 868
1898 889.1
1899 941.3
1900 919
1901 939.9
1902 1019
1903 946.6
1904 1044
1905 922.4
1906 879.6
1907 843.3
1908 918.9
1909 951.9
1910 1013
1911 934.2
1912 1007
1913 1056
1914 1006
1915 1033
1916 1000
1917 833.5
1918 694.5
1919 578.7
1920 549.4
1921 521.6
1922 565.6
1923 613.5
1924 665.3
1925 721.5
1926 782.5
1927 848.7
1928 920.4
1929 998.2
1930 1041
1931 1048
1932 1030
1933 1066
1934 1161
1935 1325
1936 1411
1937 1525
1938 1517
1939 1575
1940 1506
1941 1475
1942 1444
1943 1414
1944 1384
1945 1355
1946 1327
1947 1471
1948 1658
1949 1807
1950 1952
1951 1924
1952 2009
1953 2056
1954 2115
1955 2251
1956 2418
1957 2419
1958 2549
1959 2471
1960 2651
1961 2753
1962 2782
1963 2678
1964 2982
1965 3113
1966 3228
1967 3335
1968 3495
1969 3511
1970 3746
1971 3808
1972 3791
1973 4071
1974 4115
1975 4053
1976 4169
1977 4193
1978 4225
1979 4134
1980 4071
1981 4040
1982 4071
1983 4130
1984 4109
1985 4074
1986 4169
1987 4151
1988 4170
1989 4176
1990 4014
1991 3482
1992 2062
1993 1966
1994 2142
1995 2332
1996 2474
1997 2560
1998 2755
1999 2848
2000 3021
2001 3327
2002 3847
2003 4400
2004 4878
2005 5577
2006 6306
2007 7161
2008 7641
2009 6494
2010 6572
2011 6812
2012 7284
2013 7501
2014 7805
2015 8140
2016 8505
2017 8913
2018 9340
2019 9787