Year Measure
1800 796.6
1801 796.6
1802 796.6
1803 796.6
1804 796.6
1805 796.6
1806 796.6
1807 796.6
1808 796.6
1809 796.6
1810 796.6
1811 796.6
1812 796.6
1813 796.6
1814 796.6
1815 796.6
1816 796.6
1817 796.6
1818 796.6
1819 796.6
1820 796.6
1821 801.9
1822 807.2
1823 812.5
1824 817.9
1825 823.3
1826 828.7
1827 834.2
1828 839.7
1829 845.2
1830 850.8
1831 856.4
1832 862.1
1833 867.8
1834 873.5
1835 879.3
1836 885.1
1837 891
1838 896.9
1839 902.8
1840 908.7
1841 914.8
1842 920.8
1843 926.9
1844 933
1845 939.2
1846 945.4
1847 951.6
1848 957.9
1849 964.2
1850 970.6
1851 977
1852 983.5
1853 990
1854 996.5
1855 1003
1856 1010
1857 1016
1858 1023
1859 1030
1860 1037
1861 1044
1862 1050
1863 1057
1864 1064
1865 1071
1866 1078
1867 1086
1868 1093
1869 1100
1870 1107
1871 1115
1872 1122
1873 1129
1874 1137
1875 1144
1876 1152
1877 1160
1878 1167
1879 1175
1880 1183
1881 1190
1882 1198
1883 1206
1884 1214
1885 1222
1886 1230
1887 1238
1888 1247
1889 1255
1890 1263
1891 1272
1892 1280
1893 1288
1894 1297
1895 1305
1896 1314
1897 1323
1898 1331
1899 1340
1900 1349
1901 1358
1902 1367
1903 1376
1904 1385
1905 1394
1906 1404
1907 1413
1908 1422
1909 1432
1910 1441
1911 1451
1912 1460
1913 1470
1914 1506
1915 1543
1916 1580
1917 1619
1918 1659
1919 1700
1920 1741
1921 1784
1922 1828
1923 1872
1924 1918
1925 1965
1926 2013
1927 2063
1928 2113
1929 2165
1930 2218
1931 2273
1932 2328
1933 2385
1934 2444
1935 2504
1936 2565
1937 2628
1938 2692
1939 2758
1940 2826
1941 2895
1942 2966
1943 3039
1944 3113
1945 3190
1946 3268
1947 3348
1948 3430
1949 3514
1950 3600
1951 3688
1952 3779
1953 3871
1954 3966
1955 4063
1956 4163
1957 4265
1958 4370
1959 4477
1960 4586
1961 4699
1962 4814
1963 4932
1964 5053
1965 5177
1966 5304
1967 5434
1968 5567
1969 5703
1970 5843
1971 6123
1972 6412
1973 6803
1974 6919
1975 6484
1976 5906
1977 6391
1978 6710
1979 7554
1980 8185
1981 8703
1982 8838
1983 9548
1984 10390
1985 11380
1986 12600
1987 14020
1988 15430
1989 16590
1990 17120
1991 17390
1992 17280
1993 17810
1994 18460
1995 17240
1996 17910
1997 18330
1998 18660
1999 18980
2000 18850
2001 18900
2002 19050
2003 19750
2004 20880
2005 21570
2006 24000
2007 25390
2008 25490
2009 22520
2010 20600
2011 19990
2012 20550
2013 20640
2014 20980
2015 21380
2016 21850
2017 22330
2018 22820
2019 23320