Year Measure
1820 659
1821 662.1
1822 665.2
1823 668.3
1824 671.5
1825 674.6
1826 677.8
1827 681
1828 684.2
1829 687.4
1830 690.6
1831 693.8
1832 697.1
1833 700.3
1834 703.6
1835 706.9
1836 710.2
1837 713.6
1838 716.9
1839 720.3
1840 723.7
1841 727
1842 730.5
1843 733.9
1844 737.3
1845 740.8
1846 744.3
1847 747.7
1848 751.3
1849 754.8
1850 758.3
1851 761.9
1852 765.4
1853 769
1854 772.6
1855 776.3
1856 779.9
1857 783.6
1858 787.2
1859 790.9
1860 794.6
1861 798.4
1862 802.1
1863 805.9
1864 809.6
1865 813.4
1866 817.3
1867 821.1
1868 824.9
1869 828.8
1870 832.7
1871 836.6
1872 840.5
1873 844.5
1874 848.4
1875 852.4
1876 856.4
1877 860.4
1878 864.4
1879 868.5
1880 872.6
1881 876.7
1882 880.8
1883 884.9
1884 889.1
1885 893.2
1886 897.4
1887 901.6
1888 905.8
1889 910.1
1890 914.4
1891 918.6
1892 923
1893 927.3
1894 931.6
1895 936
1896 940.4
1897 944.8
1898 949.2
1899 953.7
1900 958.2
1901 962.6
1902 967.2
1903 971.7
1904 976.2
1905 980.8
1906 985.4
1907 990
1908 994.7
1909 999.4
1910 1004
1911 1009
1912 1013
1913 1018
1914 1027
1915 1037
1916 1046
1917 1056
1918 1065
1919 1075
1920 1085
1921 1095
1922 1105
1923 1115
1924 1125
1925 1135
1926 1146
1927 1156
1928 1166
1929 1177
1930 1188
1931 1199
1932 1210
1933 1221
1934 1232
1935 1243
1936 1254
1937 1266
1938 1277
1939 1289
1940 1300
1941 1312
1942 1324
1943 1336
1944 1348
1945 1361
1946 1373
1947 1386
1948 1398
1949 1411
1950 1424
1951 1459
1952 1493
1953 1528
1954 1563
1955 1600
1956 1636
1957 1672
1958 1709
1959 1745
1960 1766
1961 1758
1962 1782
1963 1818
1964 1850
1965 1854
1966 1905
1967 1921
1968 2007
1969 2064
1970 2084
1971 2101
1972 2145
1973 2129
1974 2173
1975 2232
1976 2215
1977 2271
1978 2323
1979 2379
1980 2533
1981 2874
1982 3016
1983 3135
1984 3280
1985 3463
1986 3597
1987 3315
1988 3071
1989 2715
1990 2593
1991 2424
1992 2284
1993 2151
1994 2042
1995 2055
1996 2104
1997 2158
1998 2211
1999 2255
2000 2297
2001 2365
2002 2463
2003 2506
2004 2543
2005 2541
2006 2551
2007 2552
2008 2573
2009 2549
2010 2570
2011 2610
2012 2663
2013 2719
2014 2779
2015 2848
2016 2924
2017 3004
2018 3089
2019 3175