Year Measure
1800 557.1
1801 557.1
1802 557.1
1803 557.1
1804 557.1
1805 557.1
1806 557.1
1807 557.1
1808 557.1
1809 557.1
1810 557.1
1811 557.1
1812 557.1
1813 557.1
1814 557.1
1815 557.1
1816 557.1
1817 557.1
1818 557.1
1819 557.1
1820 557.1
1821 559.3
1822 561.7
1823 564
1824 566.3
1825 568.6
1826 571
1827 573.3
1828 575.7
1829 578
1830 580.4
1831 582.8
1832 585.2
1833 587.6
1834 590
1835 592.5
1836 594.9
1837 597.3
1838 599.8
1839 602.3
1840 604.7
1841 607.2
1842 609.7
1843 612.2
1844 614.8
1845 617.3
1846 619.8
1847 622.4
1848 625
1849 627.5
1850 630.1
1851 632.7
1852 635.3
1853 637.9
1854 640.5
1855 643.2
1856 645.8
1857 648.5
1858 651.2
1859 653.8
1860 656.5
1861 659.2
1862 661.9
1863 664.7
1864 667.4
1865 670.1
1866 672.9
1867 675.7
1868 678.5
1869 681.2
1870 684.1
1871 686.9
1872 689.7
1873 692.5
1874 695.4
1875 698.2
1876 701.1
1877 704
1878 706.9
1879 709.8
1880 712.7
1881 715.7
1882 718.6
1883 721.6
1884 724.5
1885 727.5
1886 730.5
1887 733.5
1888 736.5
1889 739.6
1890 742.6
1891 745.7
1892 748.7
1893 751.8
1894 754.9
1895 758
1896 761.1
1897 764.3
1898 767.4
1899 770.6
1900 773.8
1901 776.9
1902 780.1
1903 783.4
1904 786.6
1905 789.8
1906 793.1
1907 796.3
1908 799.6
1909 802.9
1910 806.2
1911 809.5
1912 812.9
1913 816.2
1914 819.6
1915 822.9
1916 826.3
1917 829.7
1918 833.1
1919 836.6
1920 840
1921 843.5
1922 846.9
1923 850.4
1924 853.9
1925 857.4
1926 861
1927 864.5
1928 868.1
1929 871.6
1930 875.2
1931 878.8
1932 882.4
1933 886.1
1934 889.7
1935 893.4
1936 897.1
1937 900.8
1938 904.5
1939 908.2
1940 911.9
1941 915.7
1942 919.4
1943 923.2
1944 927
1945 930.8
1946 934.7
1947 938.5
1948 942.4
1949 946.3
1950 950.2
1951 962.2
1952 974.4
1953 986.8
1954 973
1955 977.8
1956 990
1957 956.2
1958 948.1
1959 1027
1960 1072
1961 1109
1962 1140
1963 1168
1964 1192
1965 1214
1966 1236
1967 1255
1968 1273
1969 1291
1970 1308
1971 1197
1972 1133
1973 1117
1974 1081
1975 1109
1976 1099
1977 1094
1978 1197
1979 1314
1980 1776
1981 1910
1982 1936
1983 2088
1984 2132
1985 2280
1986 2307
1987 2427
1988 2459
1989 2548
1990 2602
1991 2567
1992 2532
1993 2498
1994 2622
1995 2786
1996 2931
1997 3118
1998 3307
1999 3553
2000 3754
2001 3943
2002 4105
2003 4261
2004 4412
2005 4638
2006 5033
2007 5389
2008 5644
2009 5773
2010 5990
2011 6206
2012 6219
2013 6175
2014 6286
2015 6428
2016 6608
2017 6791
2018 6977
2019 7171