Year Measure
1820 772.5
1821 776.1
1822 779.8
1823 783.4
1824 787.1
1825 790.8
1826 794.5
1827 798.2
1828 802
1829 805.7
1830 809.5
1831 813.3
1832 817.1
1833 820.9
1834 824.8
1835 828.7
1836 832.5
1837 836.4
1838 840.4
1839 844.3
1840 848.3
1841 852.2
1842 856.2
1843 860.3
1844 864.3
1845 868.3
1846 872.4
1847 876.5
1848 880.6
1849 884.7
1850 888.9
1851 893.1
1852 897.2
1853 901.5
1854 905.7
1855 909.9
1856 914.2
1857 918.5
1858 922.8
1859 927.1
1860 931.5
1861 935.8
1862 940.2
1863 944.6
1864 949.1
1865 953.5
1866 958
1867 962.5
1868 967
1869 971.5
1870 976.1
1871 980.6
1872 985.2
1873 989.9
1874 994.5
1875 999.2
1876 1004
1877 1009
1878 1013
1879 1018
1880 1023
1881 1028
1882 1032
1883 1037
1884 1042
1885 1047
1886 1052
1887 1057
1888 1062
1889 1067
1890 1072
1891 1077
1892 1082
1893 1087
1894 1092
1895 1097
1896 1102
1897 1107
1898 1113
1899 1118
1900 1123
1901 1128
1902 1134
1903 1139
1904 1144
1905 1150
1906 1155
1907 1161
1908 1166
1909 1171
1910 1177
1911 1182
1912 1188
1913 1194
1914 1195
1915 1197
1916 1199
1917 1201
1918 1202
1919 1204
1920 1206
1921 1208
1922 1209
1923 1211
1924 1213
1925 1215
1926 1216
1927 1218
1928 1220
1929 1222
1930 1223
1931 1225
1932 1227
1933 1229
1934 1231
1935 1232
1936 1234
1937 1236
1938 1238
1939 1239
1940 1241
1941 1243
1942 1245
1943 1247
1944 1249
1945 1250
1946 1252
1947 1254
1948 1256
1949 1258
1950 1259
1951 1314
1952 1337
1953 1370
1954 1428
1955 1458
1956 1492
1957 1526
1958 1548
1959 1614
1960 1642
1961 1647
1962 1697
1963 1700
1964 1694
1965 1788
1966 1873
1967 1833
1968 1981
1969 2128
1970 2167
1971 2113
1972 2057
1973 2086
1974 2136
1975 2160
1976 2057
1977 2049
1978 2016
1979 2091
1980 2147
1981 2234
1982 2226
1983 2149
1984 2131
1985 2027
1986 1912
1987 1967
1988 1973
1989 1969
1990 1971
1991 1766
1992 1624
1993 1644
1994 1663
1995 1472
1996 1093
1997 873.2
1998 848.5
1999 775.6
2000 786.6
2001 879.4
2002 1063
2003 1100
2004 1145
2005 1200
2006 1214
2007 1275
2008 1308
2009 1317
2010 1352
2011 1397
2012 1578
2013 1798
2014 2005
2015 2191
2016 2290
2017 2365
2018 2445
2019 2519