Year Measure
1800 698.2
1801 699.8
1802 701.4
1803 703
1804 704.6
1805 706.2
1806 707.8
1807 709.4
1808 711
1809 712.6
1810 714.2
1811 715.8
1812 717.5
1813 719.1
1814 720.7
1815 722.4
1816 724
1817 725.7
1818 727.3
1819 729
1820 730.6
1821 732.3
1822 733.9
1823 735.6
1824 737.3
1825 738.9
1826 740.6
1827 742.3
1828 744
1829 745.7
1830 747.4
1831 749.1
1832 750.8
1833 752.5
1834 754.2
1835 755.9
1836 757.6
1837 759.3
1838 761
1839 762.8
1840 764.5
1841 766.2
1842 768
1843 769.7
1844 771.5
1845 773.2
1846 775
1847 776.7
1848 778.5
1849 780.3
1850 782
1851 783.8
1852 785.6
1853 787.4
1854 789.2
1855 790.9
1856 792.7
1857 794.5
1858 796.3
1859 798.2
1860 800
1861 801.8
1862 803.6
1863 805.4
1864 807.3
1865 809.1
1866 810.9
1867 812.8
1868 814.6
1869 816.5
1870 818.3
1871 820.2
1872 822
1873 823.9
1874 825.8
1875 827.6
1876 829.5
1877 831.4
1878 833.3
1879 835.2
1880 837.1
1881 839
1882 840.9
1883 842.8
1884 844.7
1885 846.6
1886 848.5
1887 850.5
1888 852.4
1889 854.3
1890 856.3
1891 858.2
1892 860.2
1893 862.1
1894 864.1
1895 866
1896 868
1897 870
1898 872
1899 873.9
1900 875.9
1901 877.9
1902 879.9
1903 881.9
1904 883.9
1905 885.9
1906 887.9
1907 889.9
1908 891.9
1909 894
1910 896
1911 898
1912 900.1
1913 902.1
1914 931.7
1915 962.2
1916 993.8
1917 1026
1918 1060
1919 1095
1920 1131
1921 1168
1922 1206
1923 1245
1924 1286
1925 1328
1926 1372
1927 1417
1928 1463
1929 1511
1930 1561
1931 1612
1932 1665
1933 1719
1934 1776
1935 1834
1936 1894
1937 1956
1938 2020
1939 2087
1940 2155
1941 2226
1942 2299
1943 2374
1944 2452
1945 2532
1946 2615
1947 2701
1948 2789
1949 2881
1950 2975
1951 3095
1952 3218
1953 3345
1954 3475
1955 3312
1956 3601
1957 3792
1958 3407
1959 3713
1960 3708
1961 3650
1962 3575
1963 3587
1964 3835
1965 4199
1966 4660
1967 5297
1968 5357
1969 4729
1970 4744
1971 4687
1972 4979
1973 4736
1974 4734
1975 4548
1976 4521
1977 4237
1978 4064
1979 3778
1980 3800
1981 3647
1982 3618
1983 3605
1984 3471
1985 3363
1986 3347
1987 3336
1988 3302
1989 3239
1990 3175
1991 3033
1992 2907
1993 3029
1994 2700
1995 2566
1996 2663
1997 2676
1998 2554
1999 2542
2000 2566
2001 2628
2002 2653
2003 2705
2004 2807
2005 2884
2006 2988
2007 3096
2008 3196
2009 3300
2010 3436
2011 3557
2012 3696
2013 3794
2014 3941
2015 4085
2016 4222
2017 4358
2018 4484
2019 4600