Year Measure
1800 820.4
1801 820.4
1802 820.4
1803 820.4
1804 820.4
1805 820.4
1806 820.4
1807 820.4
1808 820.4
1809 820.4
1810 820.4
1811 820.4
1812 820.4
1813 820.4
1814 820.4
1815 820.4
1816 820.4
1817 820.4
1818 820.4
1819 820.4
1820 820.4
1821 822.4
1822 824.5
1823 826.5
1824 828.6
1825 830.6
1826 832.7
1827 834.8
1828 836.9
1829 838.9
1830 841
1831 843.1
1832 845.2
1833 847.3
1834 849.4
1835 851.5
1836 853.6
1837 855.8
1838 857.9
1839 860
1840 862.2
1841 864.3
1842 866.5
1843 868.6
1844 870.8
1845 872.9
1846 875.1
1847 877.3
1848 879.5
1849 881.7
1850 883.9
1851 886.1
1852 888.3
1853 890.5
1854 892.7
1855 894.9
1856 897.1
1857 899.4
1858 901.6
1859 903.8
1860 906.1
1861 908.3
1862 910.6
1863 912.9
1864 915.1
1865 917.4
1866 919.7
1867 922
1868 924.3
1869 926.6
1870 928.9
1871 931.2
1872 933.5
1873 935.8
1874 938.1
1875 940.5
1876 942.8
1877 945.2
1878 947.5
1879 949.9
1880 952.2
1881 954.6
1882 957
1883 959.4
1884 961.7
1885 964.1
1886 966.5
1887 968.9
1888 971.3
1889 973.8
1890 976.2
1891 978.6
1892 981
1893 983.5
1894 985.9
1895 988.4
1896 990.8
1897 1070
1898 1125
1899 1172
1900 1219
1901 1292
1902 1346
1903 1419
1904 1449
1905 1535
1906 1637
1907 1718
1908 1729
1909 1736
1910 1744
1911 1759
1912 1798
1913 1835
1914 1801
1915 1932
1916 2106
1917 2156
1918 2142
1919 2186
1920 2180
1921 2235
1922 2390
1923 2515
1924 2709
1925 2738
1926 2969
1927 2976
1928 3119
1929 3391
1930 2956
1931 2674
1932 2530
1933 2770
1934 3094
1935 3330
1936 3434
1937 3424
1938 3422
1939 3386
1940 3397
1941 3343
1942 3212
1943 3207
1944 3424
1945 3491
1946 3565
1947 3603
1948 3660
1949 3870
1950 4102
1951 4312
1952 4422
1953 4584
1954 4592
1955 4805
1956 4891
1957 4995
1958 4876
1959 4769
1960 5278
1961 5586
1962 5832
1963 5928
1964 6160
1965 6389
1966 6735
1967 6810
1968 6552
1969 6536
1970 6852
1971 6961
1972 6986
1973 7152
1974 7323
1975 7691
1976 7592
1977 7390
1978 7198
1979 7432
1980 7578
1981 7720
1982 7570
1983 6415
1984 6563
1985 6545
1986 7045
1987 7484
1988 6723
1989 5778
1990 5370
1991 5390
1992 5231
1993 5416
1994 6028
1995 6417
1996 6440
1997 6869
1998 6760
1999 6712
2000 6814
2001 6724
2002 6952
2003 7124
2004 7249
2005 7607
2006 8071
2007 8609
2008 9309
2009 9246
2010 9906
2011 10430
2012 10920
2013 11290
2014 11730
2015 12220
2016 12730
2017 13270
2018 13820
2019 14400