Year Measure
1800 871.3
1801 871.3
1802 871.3
1803 871.3
1804 871.3
1805 871.3
1806 871.3
1807 871.3
1808 871.3
1809 871.3
1810 871.3
1811 871.3
1812 871.3
1813 871.3
1814 871.3
1815 871.3
1816 871.3
1817 871.3
1818 871.3
1819 871.3
1820 871.3
1821 871.3
1822 871.3
1823 871.3
1824 871.3
1825 871.3
1826 871.3
1827 871.3
1828 871.3
1829 871.3
1830 871.3
1831 871.3
1832 871.3
1833 871.3
1834 871.3
1835 871.3
1836 871.3
1837 871.3
1838 871.3
1839 871.3
1840 871.3
1841 871.3
1842 871.3
1843 871.4
1844 871.4
1845 871.4
1846 871.4
1847 871.4
1848 871.4
1849 871.4
1850 871.4
1851 871.4
1852 871.4
1853 871.4
1854 871.4
1855 871.4
1856 871.4
1857 871.4
1858 871.4
1859 871.4
1860 871.4
1861 871.4
1862 871.4
1863 871.4
1864 871.4
1865 871.4
1866 871.4
1867 871.4
1868 871.4
1869 871.4
1870 871.4
1871 874.3
1872 877.2
1873 880
1874 882.9
1875 885.8
1876 888.7
1877 891.6
1878 894.5
1879 897.5
1880 900.4
1881 903.4
1882 906.3
1883 909.3
1884 912.3
1885 915.3
1886 918.3
1887 921.3
1888 924.3
1889 927.3
1890 930.3
1891 933.4
1892 936.5
1893 939.5
1894 942.6
1895 945.7
1896 948.8
1897 951.9
1898 955
1899 958.1
1900 961.3
1901 964.4
1902 974.2
1903 1151
1904 1099
1905 904.9
1906 937.9
1907 1066
1908 1080
1909 1218
1910 1277
1911 1131
1912 1144
1913 1177
1914 1161
1915 1176
1916 1267
1917 1400
1918 1364
1919 1356
1920 1378
1921 1442
1922 1551
1923 1611
1924 1689
1925 1753
1926 1783
1927 1732
1928 1720
1929 1807
1930 1827
1931 1821
1932 1830
1933 1783
1934 1799
1935 1944
1936 1982
1937 1931
1938 1949
1939 1849
1940 1722
1941 1598
1942 1624
1943 1456
1944 1220
1945 647
1946 680.1
1947 851.2
1948 1052
1949 1172
1950 1304
1951 1359
1952 1468
1953 1550
1954 1638
1955 1708
1956 1737
1957 1801
1958 1859
1959 1932
1960 1984
1961 2048
1962 2137
1963 2265
1964 2465
1965 2664
1966 2821
1967 3043
1968 3244
1969 3453
1970 3757
1971 4141
1972 4590
1973 5072
1974 5025
1975 5160
1976 5754
1977 6207
1978 6909
1979 7328
1980 7672
1981 7980
1982 8086
1983 8594
1984 9353
1985 9662
1986 10620
1987 11820
1988 12590
1989 13460
1990 14120
1991 14990
1992 15960
1993 16850
1994 17870
1995 18790
1996 19750
1997 20810
1998 21490
1999 22480
2000 23530
2001 22770
2002 23490
2003 24060
2004 25330
2005 26070
2006 27360
2007 28890
2008 29000
2009 28380
2010 31370
2011 32560
2012 32840
2013 33680
2014 34840
2015 36220
2016 37690
2017 39360
2018 41170