Year Measure
1800 410.8
1801 410.8
1802 410.8
1803 410.8
1804 410.8
1805 410.8
1806 410.8
1807 410.8
1808 410.8
1809 410.8
1810 410.8
1811 410.8
1812 410.8
1813 410.8
1814 410.8
1815 410.8
1816 410.8
1817 410.8
1818 410.8
1819 410.8
1820 410.8
1821 410.8
1822 410.8
1823 410.8
1824 410.8
1825 410.8
1826 410.8
1827 410.8
1828 410.8
1829 410.8
1830 410.8
1831 410.8
1832 410.8
1833 410.8
1834 410.8
1835 410.8
1836 410.8
1837 410.8
1838 410.8
1839 410.8
1840 410.8
1841 410.8
1842 410.8
1843 410.8
1844 410.8
1845 410.8
1846 410.8
1847 410.8
1848 410.8
1849 410.8
1850 410.8
1851 410.8
1852 410.8
1853 410.8
1854 410.8
1855 410.8
1856 410.8
1857 410.8
1858 410.8
1859 410.8
1860 410.8
1861 410.8
1862 410.8
1863 410.8
1864 410.8
1865 410.8
1866 410.8
1867 410.8
1868 410.8
1869 410.8
1870 410.8
1871 410.8
1872 410.8
1873 410.8
1874 410.8
1875 410.8
1876 410.8
1877 410.8
1878 410.8
1879 410.8
1880 410.8
1881 410.8
1882 410.8
1883 410.8
1884 410.8
1885 410.8
1886 410.8
1887 410.8
1888 410.8
1889 410.8
1890 410.8
1891 410.8
1892 410.8
1893 410.8
1894 410.8
1895 410.8
1896 410.8
1897 410.8
1898 410.8
1899 410.8
1900 410.8
1901 412.4
1902 414.1
1903 415.7
1904 417.4
1905 419
1906 420.7
1907 422.4
1908 424.1
1909 425.7
1910 427.4
1911 429.1
1912 430.8
1913 432.6
1914 434.3
1915 436
1916 437.7
1917 439.5
1918 441.2
1919 443
1920 444.7
1921 446.5
1922 448.3
1923 450.1
1924 451.9
1925 453.7
1926 455.5
1927 457.3
1928 459.1
1929 460.9
1930 462.7
1931 464.6
1932 466.4
1933 468.3
1934 470.2
1935 472
1936 473.9
1937 475.8
1938 477.7
1939 479.6
1940 481.5
1941 483.4
1942 485.3
1943 487.2
1944 489.2
1945 491.1
1946 493.1
1947 495
1948 497
1949 499
1950 501
1951 536.9
1952 575.5
1953 616.8
1954 661
1955 708.5
1956 759.3
1957 813.8
1958 872.3
1959 934.9
1960 1002
1961 1138
1962 1291
1963 1466
1964 1665
1965 1890
1966 1790
1967 2134
1968 2252
1969 2506
1970 3018
1971 3728
1972 3948
1973 5295
1974 11510
1975 11360
1976 13520
1977 12760
1978 13860
1979 14890
1980 16740
1981 16570
1982 14770
1983 15820
1984 15110
1985 13510
1986 10560
1987 9438
1988 8629
1989 11300
1990 10940
1991 11410
1992 10550
1993 10150
1994 10600
1995 10580
1996 11460
1997 9352
1998 7909
1999 8569
2000 10370
2001 9583
2002 9271
2003 9956
2004 11110
2005 14890
2006 14770
2007 14720
2008 17360
2009 15670
2010 19240
2011 17490
2012 18190
2013 18990
2014 19790
2015 20740
2016 21840
2017 22860
2018 23920
2019 24970