1874 0.965 1875 0.989 1876 0.749 1877 0.706 1878 0.944 1879 0.965 1880 0.834 1881 0.782 1882 0.831 1883 0.874 1884 1.084 1885 1.101 1886 1.01 1887 0.961 1888 0.895 1889 0.947 1890 0.853 1891 0.799 1892 0.822 1893 0.688 1894 0.862 1895 0.971 1896 1.075 1897 0.923 1898 0.856 1899 1.146 1900 1.12 1901 1.148 1902 0.861 1903 0.934 1904 1.198 1905 0.824 1906 0.852 1907 0.821 1908 0.897 1909 1.062 1910 1.037 1911 1.15 1912 1.02 1913 1.204 1914 1.016 1915 0.945 1916 1.088 1917 1.004 1918 1.141 1919 1.125 1920 1.181 1921 1.182 1922 1.159 1923 1.151 1924 0.959 1925 0.929 1926 0.993 1927 0.971 1928 1.043 1929 0.939 1930 0.903 1931 1.166 1932 1.201 1933 1.227 1934 1.273 1935 1.162 1936 0.974 1937 1.36 1938 0.986 1939 1.354 1940 1.326 1941 1.217 1942 1.39 1943 1.621 1944 1.654 1945 1.462 1946 1.564 1947 1.271 1948 1.426 1949 1.23 1950 1.453 1951 1.332 1952 1.43 1953 1.407 1954 1.34 1955 1.307 1956 1.167 1957 1.382 1958 1.568 1959 1.363 1960 1.373 1961 1.438 1962 1.177 1963 1.342 1964 1.502 1965 1.353 1966 1.306 1967 1.214 1968 1.375 1969 1.283 1970 1.376 1971 1.554 1972 1.463 1973 1.618 1974 1.483 1975 1.743 1976 1.577 1977 1.583 1978 1.851 1979 1.618 1980 2.204 1981 1.342 1982 1.823