Year Measure
1800 382.1
1801 382.1
1802 382.1
1803 382.1
1804 382.1
1805 382.1
1806 382.1
1807 382.1
1808 382.1
1809 382.1
1810 382.1
1811 382.1
1812 382.1
1813 382.1
1814 382.1
1815 382.1
1816 382.1
1817 382.1
1818 382.1
1819 382.1
1820 382.1
1821 383.4
1822 384.7
1823 386
1824 387.3
1825 388.6
1826 389.9
1827 391.2
1828 392.5
1829 393.9
1830 395.2
1831 396.5
1832 397.9
1833 399.2
1834 400.6
1835 401.9
1836 403.3
1837 404.6
1838 406
1839 407.4
1840 408.7
1841 410.1
1842 411.5
1843 412.9
1844 414.3
1845 415.7
1846 417.1
1847 418.5
1848 419.9
1849 421.3
1850 422.8
1851 424.2
1852 425.6
1853 427.1
1854 428.5
1855 429.9
1856 431.4
1857 432.9
1858 434.3
1859 435.8
1860 437.2
1861 438.7
1862 440.2
1863 441.7
1864 443.2
1865 444.7
1866 446.2
1867 447.7
1868 449.2
1869 450.7
1870 452.2
1871 453.8
1872 455.3
1873 456.8
1874 458.4
1875 459.9
1876 461.5
1877 463
1878 464.6
1879 466.2
1880 467.7
1881 469.3
1882 470.9
1883 472.5
1884 474.1
1885 475.7
1886 477.3
1887 478.9
1888 480.5
1889 482.1
1890 483.8
1891 485.4
1892 487
1893 488.7
1894 490.3
1895 492
1896 493.7
1897 495.3
1898 497
1899 498.7
1900 500.4
1901 502
1902 503.7
1903 505.4
1904 507.1
1905 508.9
1906 510.6
1907 512.3
1908 514
1909 515.8
1910 517.5
1911 519.2
1912 521
1913 522.8
1914 531.5
1915 540.5
1916 549.6
1917 558.8
1918 568.2
1919 577.7
1920 587.4
1921 597.3
1922 607.3
1923 617.5
1924 627.9
1925 638.5
1926 649.2
1927 660.1
1928 671.2
1929 682.5
1930 693.9
1931 705.6
1932 717.4
1933 729.5
1934 741.7
1935 754.2
1936 766.9
1937 779.8
1938 792.9
1939 806.2
1940 819.7
1941 833.5
1942 847.5
1943 861.7
1944 876.2
1945 890.9
1946 905.9
1947 921.1
1948 936.6
1949 952.3
1950 968.3
1951 984.6
1952 1001
1953 1018
1954 1035
1955 1052
1956 1070
1957 1088
1958 1106
1959 1125
1960 1144
1961 1163
1962 1183
1963 1203
1964 1223
1965 1243
1966 1264
1967 1285
1968 1305
1969 1228
1970 1248
1971 1233
1972 852.2
1973 916.3
1974 1116
1975 948.4
1976 1042
1977 1152
1978 1213
1979 1464
1980 1328
1981 1455
1982 1446
1983 1590
1984 1556
1985 1519
1986 1766
1987 1757
1988 1771
1989 1862
1990 1843
1991 1898
1992 2079
1993 2100
1994 2229
1995 2344
1996 2316
1997 2219
1998 2197
1999 2128
2000 1776
2001 1574
2002 1508
2003 1564
2004 1647
2005 1687
2006 1714
2007 1782
2008 1864
2009 1735
2010 1794
2011 1935
2012 1986
2013 1999
2014 2033
2015 2060
2016 2085
2017 2112
2018 2140
2019 2169