Year Measure
1800 950
1801 951.4
1802 952.8
1803 954.1
1804 955.5
1805 956.9
1806 958.3
1807 959.7
1808 961.1
1809 962.4
1810 963.8
1811 965.2
1812 966.6
1813 968
1814 969.4
1815 970.8
1816 972.2
1817 973.6
1818 975.1
1819 976.5
1820 977.9
1821 983.8
1822 989.7
1823 995.7
1824 1002
1825 1008
1826 1014
1827 1020
1828 1026
1829 1032
1830 1038
1831 956.8
1832 971.4
1833 1080
1834 1130
1835 1107
1836 1077
1837 1080
1838 1085
1839 1086
1840 1185
1841 1208
1842 1216
1843 1190
1844 1213
1845 1267
1846 1291
1847 1242
1848 1175
1849 1206
1850 1236
1851 1313
1852 1301
1853 1362
1854 1401
1855 1472
1856 1444
1857 1365
1858 1416
1859 1446
1860 1498
1861 1457
1862 1584
1863 1589
1864 1649
1865 1720
1866 1737
1867 1774
1868 1767
1869 1834
1870 1826
1871 1851
1872 1964
1873 2001
1874 2062
1875 2103
1876 2136
1877 2129
1878 2031
1879 2026
1880 2077
1881 2096
1882 2099
1883 2096
1884 2127
1885 2134
1886 2134
1887 2152
1888 2249
1889 2332
1890 2385
1891 2393
1892 2428
1893 2482
1894 2479
1895 2482
1896 2523
1897 2624
1898 2612
1899 2661
1900 2668
1901 2709
1902 2732
1903 2705
1904 2704
1905 2716
1906 2822
1907 2937
1908 3014
1909 3058
1910 3168
1911 3274
1912 3410
1913 3566
1914 3610
1915 3737
1916 3852
1917 3468
1918 3300
1919 3836
1920 4045
1921 3615
1922 3970
1923 4058
1924 4041
1925 4269
1926 4316
1927 4469
1928 4658
1929 5089
1930 5460
1931 5012
1932 5238
1933 5350
1934 5518
1935 5774
1936 6144
1937 6396
1938 6514
1939 6800
1940 6195
1941 6322
1942 6049
1943 5895
1944 5546
1945 6164
1946 6728
1947 7563
1948 8013
1949 8158
1950 8490
1951 8884
1952 9126
1953 9413
1954 9809
1955 9948
1956 10400
1957 10640
1958 10560
1959 10940
1960 11480
1961 12130
1962 12390
1963 12790
1964 13360
1965 13980
1966 14420
1967 15220
1968 15460
1969 16050
1970 16290
1971 17040
1972 17810
1973 18500
1974 19190
1975 20120
1976 21250
1977 22100
1978 22830
1979 23820
1980 24960
1981 25160
1982 25170
1983 26040
1984 27550
1985 28950
1986 29950
1987 30480
1988 30360
1989 30580
1990 31160
1991 32200
1992 33140
1993 33900
1994 35550
1995 36980
1996 38790
1997 40660
1998 41360
1999 42010
2000 43170
2001 43890
2002 44430
2003 44770
2004 46390
2005 47550
2006 48220
2007 48980
2008 48320
2009 47120
2010 46600
2011 46610
2012 47380
2013 48020
2014 48540
2015 49000
2016 49480
2017 49960
2018 50470