Year Measure
1800 411
1801 411.2
1802 411.3
1803 411.5
1804 411.7
1805 411.9
1806 412.1
1807 412.2
1808 412.4
1809 412.6
1810 412.8
1811 413
1812 413.1
1813 413.3
1814 413.5
1815 413.7
1816 413.8
1817 414
1818 414.2
1819 414.4
1820 414.6
1821 414.7
1822 414.9
1823 415.1
1824 415.3
1825 415.5
1826 415.6
1827 415.8
1828 416
1829 416.2
1830 416.4
1831 416.5
1832 416.7
1833 416.9
1834 417.1
1835 417.3
1836 417.4
1837 417.6
1838 417.8
1839 418
1840 418.2
1841 418.3
1842 418.5
1843 418.7
1844 418.9
1845 419.1
1846 419.2
1847 419.4
1848 419.6
1849 419.8
1850 420
1851 420.2
1852 420.3
1853 420.5
1854 420.7
1855 420.9
1856 421.1
1857 421.2
1858 421.4
1859 421.6
1860 421.8
1861 422
1862 422.2
1863 422.3
1864 422.5
1865 422.7
1866 422.9
1867 423.1
1868 423.3
1869 423.4
1870 423.6
1871 423.8
1872 424
1873 424.2
1874 424.4
1875 424.5
1876 424.7
1877 424.9
1878 425.1
1879 425.3
1880 425.5
1881 425.6
1882 425.8
1883 426
1884 426.2
1885 426.4
1886 426.6
1887 426.8
1888 426.9
1889 427.1
1890 427.3
1891 427.5
1892 427.7
1893 427.9
1894 428
1895 428.2
1896 428.4
1897 428.6
1898 428.8
1899 429
1900 429.2
1901 429.3
1902 429.5
1903 429.7
1904 429.9
1905 430.1
1906 430.3
1907 430.5
1908 430.6
1909 430.8
1910 431
1911 431.2
1912 431.4
1913 431.6
1914 431.8
1915 432
1916 432.1
1917 432.3
1918 432.5
1919 432.7
1920 432.9
1921 433.1
1922 433.3
1923 433.4
1924 433.6
1925 433.8
1926 434
1927 434.2
1928 434.4
1929 434.6
1930 434.8
1931 435
1932 435.1
1933 435.3
1934 435.5
1935 435.7
1936 435.9
1937 436.1
1938 436.3
1939 436.5
1940 436.6
1941 436.8
1942 437
1943 437.2
1944 437.4
1945 437.6
1946 437.8
1947 438
1948 438.2
1949 438.4
1950 438.5
1951 447.1
1952 455.8
1953 463.9
1954 466.9
1955 487.1
1956 480.6
1957 482.2
1958 495.4
1959 511.8
1960 513.6
1961 517.5
1962 541.6
1963 511.2
1964 522.1
1965 522.7
1966 527.8
1967 551.3
1968 599.2
1969 655.1
1970 674.3
1971 702.6
1972 705.3
1973 724.7
1974 651.6
1975 543.1
1976 500.9
1977 488.7
1978 477.9
1979 470
1980 472.2
1981 470.7
1982 449.7
1983 411.4
1984 395.6
1985 356.1
1986 359.2
1987 379.3
1988 413
1989 431.1
1990 431.2
1991 443.1
1992 399.8
1993 418.5
1994 417.1
1995 408.5
1996 424.1
1997 459.5
1998 505.3
1999 531
2000 528.1
2001 584.9
2002 616.5
2003 653.6
2004 691.2
2005 722.9
2006 770.2
2007 810.1
2008 848.5
2009 884.5
2010 928.6
2011 977.1
2012 1022
2013 1068
2014 1130
2015 1190
2016 1250
2017 1317
2018 1386
2019 1460