1878 0.970000 1879 1.42000 1880 1.60000 1881 2.60000 1882 3.51000 1883 3.53000 1884 3.68000 1885 3.48000 1886 3.91000 1887 3.92000 1888 3.73000 1889 5.36000 1890 5.38000 1891 5.67000 1892 5.73000 1893 4.39000 1894 4.36000 1895 5.34000 1896 3.17000 1897 4.36000 1898 3.92000 1899 4.00000 1900 4.14000 1901 5.98000 1902 6.05000 1903 6.91000 1904 6.74000 1905 10.4600 1906 13.2800 1907 14.2300 1908 10.6800 1909 14.3000 1910 17.4200 1911 19.0000 1912 25.5900 1913 30.4300 1914 28.2000 1915 32.2400 1916 51.0700 1917 39.6700 1918 18.2300 1919 83.0000 1920 77.7400 1921 58.0900 1922 94.6200 1923 129.720 1924 160.060 1925 180.130 1926 183.720 1927 145.560 1928 129.260 1929 100.540 1930 48.3700 1931 23.0700 1932 8.68000 1933 3.95000 1934 8.84000 1935 21.2200 1936 43.1700 1937 52.9100 1938 51.4300 1939 61.6600 1940 81.1400 1941 75.8300 1942 54.9900 1943 36.2200 1944 27.2300