Year Measure
1800 951
1801 951
1802 951
1803 951
1804 951
1805 951
1806 951
1807 951
1808 951
1809 951
1810 951
1811 951
1812 951
1813 951
1814 951
1815 951
1816 951
1817 951
1818 951
1819 951
1820 951
1821 952.3
1822 953.5
1823 954.8
1824 956.1
1825 957.3
1826 958.6
1827 959.9
1828 961.2
1829 962.5
1830 963.7
1831 965
1832 966.3
1833 967.6
1834 968.9
1835 970.2
1836 971.4
1837 972.7
1838 974
1839 975.3
1840 976.6
1841 977.9
1842 979.2
1843 980.5
1844 981.8
1845 983.1
1846 984.4
1847 985.7
1848 987.1
1849 988.4
1850 989.7
1851 991
1852 992.3
1853 993.6
1854 995
1855 996.3
1856 997.6
1857 998.9
1858 1000
1859 1002
1860 1003
1861 1004
1862 1006
1863 1007
1864 1008
1865 1010
1866 1011
1867 1012
1868 1014
1869 1015
1870 1016
1871 1018
1872 1019
1873 1020
1874 1022
1875 1023
1876 1024
1877 1026
1878 1027
1879 1029
1880 1030
1881 1031
1882 1033
1883 1034
1884 1035
1885 1037
1886 1038
1887 1040
1888 1041
1889 1042
1890 1044
1891 1045
1892 1046
1893 1048
1894 1049
1895 1051
1896 1052
1897 1053
1898 1055
1899 1056
1900 1058
1901 1059
1902 1060
1903 1062
1904 1063
1905 1065
1906 1066
1907 1068
1908 1069
1909 1070
1910 1072
1911 1073
1912 1075
1913 1076
1914 1078
1915 1079
1916 1080
1917 1082
1918 1083
1919 1085
1920 1086
1921 1088
1922 1089
1923 1090
1924 1092
1925 1093
1926 1095
1927 1096
1928 1098
1929 1099
1930 1101
1931 1102
1932 1104
1933 1105
1934 1107
1935 1108
1936 1109
1937 1111
1938 1112
1939 1114
1940 1115
1941 1117
1942 1118
1943 1120
1944 1121
1945 1123
1946 1124
1947 1126
1948 1127
1949 1129
1950 1130
1951 1141
1952 1183
1953 1166
1954 1271
1955 1214
1956 1340
1957 1394
1958 1426
1959 1524
1960 1572
1961 1516
1962 1596
1963 1669
1964 1580
1965 1612
1966 1641
1967 1681
1968 1712
1969 1694
1970 1676
1971 1570
1972 1469
1973 1184
1974 1122
1975 1117
1976 1137
1977 994.5
1978 1022
1979 907.4
1980 855
1981 837.1
1982 806.1
1983 804.8
1984 804.5
1985 801
1986 805.8
1987 936.4
1988 1011
1989 1043
1990 1013
1991 1074
1992 1115
1993 1021
1994 1075
1995 1145
1996 1080
1997 1132
1998 1132
1999 1255
2000 1319
2001 1406
2002 1531
2003 1633
2004 1757
2005 1951
2006 2111
2007 2300
2008 2414
2009 2376
2010 2496
2011 2646
2012 2811
2013 2979
2014 3163
2015 3361
2016 3570
2017 3801
2018 4044
2019 4304