Year Measure
1800 833.2
1801 836.4
1802 839.6
1803 842.8
1804 846
1805 849.2
1806 852.5
1807 855.7
1808 859
1809 862.3
1810 865.6
1811 868.9
1812 872.2
1813 875.5
1814 878.9
1815 882.2
1816 885.6
1817 889
1818 892.4
1819 895.8
1820 899.2
1821 902.7
1822 906.1
1823 909.6
1824 913
1825 916.5
1826 920
1827 923.5
1828 927.1
1829 930.6
1830 934.2
1831 937.7
1832 941.3
1833 944.9
1834 948.5
1835 952.1
1836 955.8
1837 959.4
1838 963.1
1839 966.8
1840 970.5
1841 974.2
1842 977.9
1843 981.6
1844 985.4
1845 989.1
1846 992.9
1847 996.7
1848 1001
1849 1004
1850 1008
1851 1012
1852 1016
1853 1020
1854 1024
1855 1028
1856 1032
1857 1035
1858 1039
1859 1043
1860 1047
1861 1051
1862 1055
1863 1059
1864 1063
1865 1068
1866 1072
1867 1076
1868 1080
1869 1084
1870 1088
1871 1092
1872 1096
1873 1101
1874 1105
1875 1109
1876 1113
1877 1117
1878 1122
1879 1126
1880 1130
1881 1135
1882 1139
1883 1143
1884 1148
1885 1152
1886 1156
1887 1161
1888 1165
1889 1170
1890 1174
1891 1179
1892 1183
1893 1188
1894 1192
1895 1197
1896 1201
1897 1206
1898 1211
1899 1215
1900 1220
1901 1225
1902 1229
1903 1234
1904 1239
1905 1243
1906 1248
1907 1253
1908 1258
1909 1262
1910 1267
1911 1272
1912 1277
1913 1282
1914 1329
1915 1379
1916 1430
1917 1483
1918 1538
1919 1595
1920 1655
1921 1716
1922 1780
1923 1846
1924 1915
1925 1986
1926 2059
1927 2136
1928 2215
1929 2298
1930 2383
1931 2471
1932 2563
1933 2658
1934 2757
1935 2860
1936 2966
1937 3076
1938 3190
1939 3309
1940 3432
1941 3559
1942 3691
1943 3828
1944 3971
1945 4118
1946 4271
1947 4430
1948 4594
1949 4765
1950 4942
1951 5217
1952 5297
1953 5386
1954 5617
1955 5593
1956 5537
1957 5649
1958 5684
1959 5825
1960 6116
1961 5623
1962 5959
1963 6353
1964 6430
1965 6292
1966 6291
1967 6154
1968 6517
1969 6345
1970 6642
1971 7520
1972 7786
1973 8331
1974 8278
1975 8401
1976 9063
1977 9538
1978 10040
1979 11530
1980 11050
1981 10450
1982 10240
1983 10170
1984 10550
1985 11540
1986 11560
1987 11620
1988 12190
1989 13360
1990 14290
1991 14490
1992 15460
1993 16240
1994 15430
1995 15280
1996 16560
1997 18360
1998 18450
1999 18430
2000 19050
2001 18600
2002 18480
2003 17380
2004 16940
2005 18390
2006 19700
2007 21640
2008 20710
2009 20400
2010 21020
2011 22420
2012 22790
2013 23340
2014 23920
2015 24550
2016 25160
2017 25770
2018 26370
2019 26970