1852 4.06000 1853 4.01000 1854 4.04000 1855 4.08000 1856 4.21000 1857 4.19000 1858 4.13000 1859 4.02000 1860 3.99000 1861 3.90000 1862 3.82000 1863 3.70000 1864 3.69000 1865 3.65000 1866 3.65000 1867 3.63000 1868 3.94000 1869 3.98000 1870 3.76000 1871 3.82000 1872 3.83000 1873 3.66000 1874 3.82000 1875 3.50000 1876 3.11000 1877 3.31000 1878 3.37000 1879 3.05000 1880 3.06000 1881 2.96000 1882 3.16000 1883 2.71000 1884 2.74000 1885 2.55000 1886 2.36000 1887 2.39000 1888 2.66000 1889 2.54000 1890 2.48000 1891 2.39000 1892 2.30000 1893 1.95000 1894 1.98000 1895 1.45000 1896 1.73000 1897 1.94000 1898 2.16000 1899 2.05000 1900 1.90000 1901 1.74000 1902 1.77000 1903 1.62000 1904 1.41000 1905 1.84000 1906 1.80000 1907 1.66000 1908 1.66000 1909 1.87000 1910 1.86000 1911 1.95000 1912 1.97000 1913 1.79000 1914 1.91000 1915 2.33000 1916 2.05000 1917 2.10000 1918 2.79000 1919 2.37000 1920 1.98000 1921 2.08000 1922 2.07000 1923 1.84000 1924 1.63000 1925 1.58000 1926 1.68000 1927 1.74000 1928 1.49000 1929 1.41000 1930 1.43000 1931 1.27000 1932 1.36000 1933 1.79000 1934 1.96000 1935 2.04000 1936 2.06000 1937 2.06000 1938 2.16000