Year Measure
1800 653.6
1801 653.6
1802 653.6
1803 653.6
1804 653.6
1805 653.6
1806 653.6
1807 653.6
1808 653.6
1809 653.6
1810 653.6
1811 653.6
1812 653.7
1813 653.7
1814 653.7
1815 653.7
1816 653.7
1817 653.7
1818 653.7
1819 653.7
1820 653.7
1821 657.1
1822 660.6
1823 664.1
1824 667.6
1825 671.2
1826 674.7
1827 678.3
1828 681.9
1829 685.5
1830 689.1
1831 692.7
1832 696.4
1833 700.1
1834 703.8
1835 707.5
1836 711.3
1837 715
1838 718.8
1839 722.6
1840 726.4
1841 730.3
1842 734.1
1843 738
1844 741.9
1845 745.9
1846 749.8
1847 753.8
1848 757.8
1849 761.8
1850 765.8
1851 769.8
1852 773.9
1853 778
1854 782.1
1855 786.3
1856 790.4
1857 794.6
1858 798.8
1859 803
1860 807.3
1861 811.6
1862 815.9
1863 820.2
1864 824.5
1865 828.9
1866 833.3
1867 837.7
1868 842.1
1869 846.6
1870 851
1871 855.5
1872 860.1
1873 864.6
1874 869.2
1875 873.8
1876 878.4
1877 883.1
1878 887.7
1879 892.4
1880 897.1
1881 901.9
1882 906.7
1883 911.5
1884 916.3
1885 921.1
1886 884.6
1887 1033
1888 993
1889 922.4
1890 917.6
1891 839.7
1892 918.3
1893 1040
1894 1181
1895 1091
1896 1201
1897 1180
1898 1210
1899 1282
1900 1253
1901 1283
1902 1393
1903 1296
1904 1431
1905 1266
1906 1208
1907 1160
1908 1265
1909 1312
1910 1399
1911 1291
1912 1394
1913 1463
1914 1395
1915 1434
1916 1274
1917 1117
1918 683.4
1919 588.5
1920 590.3
1921 539.8
1922 625.9
1923 720.2
1924 911.4
1925 1138
1926 1276
1927 1328
1928 1395
1929 1410
1930 1472
1931 1484
1932 1459
1933 1513
1934 1650
1935 1884
1936 2011
1937 2175
1938 2167
1939 2252
1940 2156
1941 2113
1942 2072
1943 2031
1944 1990
1945 1951
1946 1913
1947 2123
1948 2396
1949 2614
1950 2829
1951 2790
1952 2917
1953 2990
1954 3079
1955 3281
1956 3528
1957 3534
1958 3729
1959 3618
1960 3887
1961 4037
1962 4079
1963 3926
1964 4373
1965 4565
1966 4733
1967 4889
1968 5125
1969 5148
1970 5492
1971 5583
1972 5559
1973 5969
1974 6088
1975 6051
1976 6280
1977 6374
1978 6480
1979 6399
1980 6358
1981 6367
1982 6473
1983 6627
1984 6652
1985 6655
1986 6872
1987 6905
1988 6999
1989 7072
1990 6859
1991 5621
1992 3973
1993 3915
1994 2703
1995 2667
1996 2515
1997 2560
1998 2397
1999 2317
2000 2367
2001 2511
2002 2705
2003 2872
2004 3080
2005 3304
2006 3472
2007 3585
2008 3874
2009 3647
2010 3910
2011 4179
2012 4150
2013 4517
2014 4676
2015 4888
2016 5109
2017 5315
2018 5529
2019 5751