Year Measure
1800 567.4
1801 567.7
1802 567.9
1803 568.2
1804 568.5
1805 568.7
1806 569
1807 569.2
1808 569.5
1809 569.8
1810 570
1811 570.3
1812 570.6
1813 570.8
1814 571.1
1815 571.3
1816 571.6
1817 571.9
1818 572.1
1819 572.4
1820 572.7
1821 572.9
1822 573.2
1823 573.5
1824 573.7
1825 574
1826 574.3
1827 574.5
1828 574.8
1829 575.1
1830 575.3
1831 575.6
1832 575.9
1833 576.1
1834 576.4
1835 576.6
1836 576.9
1837 577.2
1838 577.4
1839 577.7
1840 578
1841 578.2
1842 578.5
1843 578.8
1844 579.1
1845 579.3
1846 579.6
1847 579.9
1848 580.1
1849 580.4
1850 580.7
1851 580.9
1852 581.2
1853 581.5
1854 581.7
1855 582
1856 582.3
1857 582.5
1858 582.8
1859 583.1
1860 583.3
1861 583.6
1862 583.9
1863 584.2
1864 584.4
1865 584.7
1866 585
1867 585.2
1868 585.5
1869 585.8
1870 586
1871 586.3
1872 586.6
1873 586.9
1874 587.1
1875 587.4
1876 587.7
1877 587.9
1878 588.2
1879 588.5
1880 588.8
1881 589
1882 589.3
1883 589.6
1884 589.8
1885 590.1
1886 590.4
1887 590.7
1888 590.9
1889 591.2
1890 591.5
1891 591.8
1892 592
1893 592.3
1894 592.6
1895 592.9
1896 593.1
1897 593.4
1898 593.7
1899 593.9
1900 594.2
1901 594.5
1902 594.8
1903 595
1904 595.3
1905 595.6
1906 595.9
1907 596.1
1908 596.4
1909 596.7
1910 597
1911 597.2
1912 597.5
1913 597.8
1914 611.6
1915 625.7
1916 640.1
1917 654.9
1918 670
1919 685.5
1920 701.3
1921 717.5
1922 734
1923 751
1924 768.3
1925 786
1926 804.1
1927 822.7
1928 841.7
1929 861.1
1930 881
1931 901.3
1932 922.1
1933 943.4
1934 965.1
1935 987.4
1936 1010
1937 1033
1938 1057
1939 1082
1940 1107
1941 1132
1942 1158
1943 1185
1944 1212
1945 1240
1946 1269
1947 1298
1948 1328
1949 1359
1950 1390
1951 1422
1952 1455
1953 1489
1954 1523
1955 1558
1956 1594
1957 1631
1958 1669
1959 1707
1960 1746
1961 1787
1962 1828
1963 1870
1964 1913
1965 1957
1966 2003
1967 2049
1968 2096
1969 2144
1970 2194
1971 2244
1972 2296
1973 2349
1974 2588
1975 2484
1976 2402
1977 2378
1978 2430
1979 2396
1980 2139
1981 2183
1982 2152
1983 2391
1984 2344
1985 2178
1986 2542
1987 2744
1988 2873
1989 2786
1990 2960
1991 2891
1992 3041
1993 3180
1994 3332
1995 3574
1996 3183
1997 2960
1998 2864
1999 2787
2000 2946
2001 3103
2002 3185
2003 3193
2004 3194
2005 3279
2006 3339
2007 3436
2008 3364
2009 3307
2010 3487
2011 3510
2012 3609
2013 3582
2014 3638
2015 3641
2016 3636
2017 3628
2018 3605
2019 3602