Year Measure
1820 473.9
1821 474.8
1822 475.7
1823 476.6
1824 477.5
1825 478.4
1826 479.3
1827 480.2
1828 481.1
1829 482
1830 482.9
1831 483.8
1832 484.8
1833 485.7
1834 486.6
1835 487.5
1836 488.5
1837 489.4
1838 490.3
1839 491.2
1840 492.2
1841 493.1
1842 494
1843 495
1844 495.9
1845 496.9
1846 497.8
1847 498.7
1848 499.7
1849 500.6
1850 501.6
1851 502.5
1852 503.5
1853 504.4
1854 505.4
1855 506.4
1856 507.3
1857 508.3
1858 509.3
1859 510.2
1860 511.2
1861 512.2
1862 513.1
1863 514.1
1864 515.1
1865 516.1
1866 517
1867 518
1868 519
1869 520
1870 521
1871 522
1872 522.9
1873 523.9
1874 524.9
1875 525.9
1876 526.9
1877 527.9
1878 528.9
1879 529.9
1880 530.9
1881 531.9
1882 533
1883 534
1884 535
1885 536
1886 537
1887 538
1888 539
1889 540.1
1890 541.1
1891 542.1
1892 543.1
1893 544.2
1894 545.2
1895 546.2
1896 547.3
1897 548.3
1898 549.4
1899 550.4
1900 551.4
1901 552.5
1902 553.5
1903 554.6
1904 555.6
1905 556.7
1906 557.8
1907 558.8
1908 559.9
1909 560.9
1910 562
1911 563.1
1912 564.1
1913 565.2
1914 566.3
1915 567.4
1916 568.4
1917 569.5
1918 570.6
1919 571.7
1920 572.8
1921 573.8
1922 574.9
1923 576
1924 577.1
1925 578.2
1926 579.3
1927 580.4
1928 581.5
1929 582.6
1930 583.7
1931 584.8
1932 585.9
1933 587
1934 588.2
1935 589.3
1936 590.4
1937 591.5
1938 592.6
1939 593.8
1940 594.9
1941 596
1942 597.1
1943 598.3
1944 599.4
1945 600.5
1946 601.7
1947 602.8
1948 604
1949 605.1
1950 606.3
1951 633.1
1952 643.1
1953 656.7
1954 685.1
1955 697.4
1956 712.7
1957 726.3
1958 735.8
1959 764.9
1960 783.2
1961 820.1
1962 865.1
1963 803.7
1964 840.2
1965 881.1
1966 883
1967 893.3
1968 902.8
1969 911.5
1970 924.8
1971 934.6
1972 934.8
1973 956.3
1974 1003
1975 1024
1976 1101
1977 1102
1978 1108
1979 1087
1980 1101
1981 1084
1982 1080
1983 1070
1984 1050
1985 1018
1986 1010
1987 1015
1988 1049
1989 1063
1990 1052
1991 1005
1992 1001
1993 1020
1994 1028
1995 1040
1996 1057
1997 1096
1998 1131
1999 1147
2000 1143
2001 1178
2002 1192
2003 1178
2004 1182
2005 1192
2006 1197
2007 1193
2008 1224
2009 1191
2010 1184
2011 1200
2012 1216
2013 1216
2014 1240
2015 1270
2016 1302
2017 1337
2018 1532
2019 1758