Year Measure
1800 414
1801 414
1802 414
1803 414
1804 414
1805 414
1806 414
1807 414
1808 414
1809 414
1810 414
1811 414
1812 414
1813 414
1814 414
1815 414
1816 414
1817 414
1818 414
1819 414
1820 414
1821 418.4
1822 422.8
1823 427.3
1824 431.8
1825 436.3
1826 440.9
1827 445.6
1828 450.3
1829 455.1
1830 459.9
1831 464.7
1832 469.6
1833 474.6
1834 479.6
1835 484.7
1836 489.8
1837 495
1838 500.2
1839 505.5
1840 510.8
1841 516.2
1842 521.7
1843 527.2
1844 532.7
1845 538.4
1846 544.1
1847 549.8
1848 555.6
1849 561.5
1850 567.4
1851 573.4
1852 579.5
1853 585.6
1854 591.8
1855 598
1856 604.3
1857 610.7
1858 617.2
1859 623.7
1860 630.3
1861 636.9
1862 643.7
1863 650.5
1864 657.3
1865 664.3
1866 671.3
1867 678.4
1868 685.6
1869 692.8
1870 700.1
1871 707.5
1872 715
1873 722.5
1874 730.2
1875 737.9
1876 745.7
1877 753.5
1878 761.5
1879 769.6
1880 777.7
1881 785.9
1882 794.2
1883 802.6
1884 811.1
1885 819.6
1886 828.3
1887 837
1888 845.9
1889 854.8
1890 863.8
1891 873
1892 882.2
1893 891.5
1894 900.9
1895 910.4
1896 920.1
1897 929.8
1898 939.6
1899 949.5
1900 959.6
1901 969.7
1902 979.9
1903 990.3
1904 1001
1905 1011
1906 1022
1907 1033
1908 1044
1909 1055
1910 1066
1911 1077
1912 1089
1913 1100
1914 1134
1915 1169
1916 1205
1917 1243
1918 1281
1919 1321
1920 1362
1921 1404
1922 1447
1923 1492
1924 1538
1925 1586
1926 1635
1927 1686
1928 1738
1929 1792
1930 1847
1931 1905
1932 1964
1933 2024
1934 2087
1935 2152
1936 2218
1937 2287
1938 2358
1939 2431
1940 2506
1941 2584
1942 2664
1943 2746
1944 2831
1945 2919
1946 3010
1947 3103
1948 3199
1949 3298
1950 3400
1951 3589
1952 3789
1953 3999
1954 4222
1955 4456
1956 4704
1957 4966
1958 5242
1959 5533
1960 5841
1961 6166
1962 6509
1963 6871
1964 7253
1965 7656
1966 8082
1967 8531
1968 9005
1969 9506
1970 10030
1971 11080
1972 11550
1973 12160
1974 12730
1975 12720
1976 13420
1977 14590
1978 15460
1979 16190
1980 17510
1981 17480
1982 16520
1983 16870
1984 15790
1985 16160
1986 17110
1987 17870
1988 18690
1989 19790
1990 17370
1991 17290
1992 16390
1993 15570
1994 16500
1995 17120
1996 17370
1997 17610
1998 18960
1999 19180
2000 20500
2001 20700
2002 20430
2003 20280
2004 21090
2005 21850
2006 23030
2007 23860
2008 24410
2009 23790
2010 24970
2011 25730
2012 26210
2013 26690