1917 1 . 1917 2 . 1917 3 . 1917 4 . 1917 5 . 1917 6 . 1917 7 . 1917 8 6.41000 1917 9 5.86000 1917 10 4.93000 1917 11 3.97000 1917 12 3.89000 1918 1 3.44000 1918 2 3.50000 1918 3 5.22000 1918 4 6.31000 1918 5 7.47000 1918 6 7.30000 1918 7 8.42000 1918 8 8.08000 1918 9 6.78000 1918 10 7.13000 1918 11 5.84000 1918 12 5.00000 1919 1 4.03000 1919 2 4.43000 1919 3 4.79000 1919 4 5.80000 1919 5 7.80000 1919 6 7.29000 1919 7 9.44000 1919 8 8.96000 1919 9 8.75000 1919 10 8.06000 1919 11 6.78000 1919 12 5.67000 1920 1 5.62000 1920 2 5.91000 1920 3 6.10000 1920 4 7.07000 1920 5 9.02000 1920 6 10.1800 1920 7 10.3500 1920 8 11.4200 1920 9 10.7400 1920 10 9.16000 1920 11 8.73000 1920 12 6.90000 1921 1 7.02000 1921 2 5.36000 1921 3 8.24000 1921 4 7.94000 1921 5 8.44000 1921 6 10.5500 1921 7 10.9000 1921 8 12.0200 1921 9 10.4300 1921 10 10.8300 1921 11 8.35000 1921 12 7.45000 1922 1 6.73000 1922 2 6.26000 1922 3 9.06000 1922 4 9.17000 1922 5 11.9000 1922 6 12.0700 1922 7 13.4800 1922 8 13.9000 1922 9 12.0900 1922 10 11.6800 1922 11 11.2300 1922 12 10.3400 1923 1 10.8800 1923 2 9.05000 1923 3 10.6300 1923 4 11.5600 1923 5 13.8700 1923 6 13.2900 1923 7 15.5100 1923 8 16.5500 1923 9 15.2500 1923 10 14.6500 1923 11 12.7300 1923 12 12.7800 1924 1 11.9200 1924 2 9.63000 1924 3 10.9600 1924 4 14.5800 1924 5 15.8900 1924 6 16.4200 1924 7 18.6100 1924 8 19.8200 1924 9 16.8700 1924 10 18.0300 1924 11 16.6100 1924 12 15.6600 1925 1 14.3900 1925 2 13.2100 1925 3 14.8900 1925 4 19.0100 1925 5 20.4600 1925 6 20.7200 1925 7 22.8800 1925 8 22.3200 1925 9 20.1800 1925 10 19.8300 1925 11 18.0200 1925 12 17.9500 1926 1 17.5000 1926 2 15.7400 1926 3 19.2300 1926 4 20.8100 1926 5 24.1800 1926 6 23.7700 1926 7 24.7200 1926 8 26.8600 1926 9 22.9700 1926 10 23.9400 1926 11 20.6700 1926 12 21.4200 1927 1 17.7000 1927 2 18.3300 1927 3 22.5000 1927 4 23.2300 1927 5 26.4800 1927 6 27.5400 1927 7 29.5200 1927 8 29.5600 1927 9 28.4000 1927 10 25.5100 1927 11 24.4800 1927 12 23.5500 1928 1 20.6900 1928 2 21.3200 1928 3 24.3200 1928 4 25.5600 1928 5 28.3600 1928 6 29.5700 1928 7 32.5300 1928 8 33.1700 1928 9 29.7700 1928 10 30.7000 1928 11 25.9400 1928 12 26.5800 1929 1 22.8200 1929 2 22.7800 1929 3 27.2700 1929 4 32.0000 1929 5 34.4500 1929 6 32.8800 1929 7 37.1100 1929 8 37.6500 1929 9 34.3400 1929 10 32.9200 1929 11 31.3700 1929 12 26.8900 1930 1 24.9300 1930 2 25.8200 1930 3 30.2200 1930 4 33.6100 1930 5 35.6600 1930 6 35.1400 1930 7 37.7800 1930 8 36.7200 1930 9 37.2400 1930 10 31.4400 1930 11 30.1800 1930 12 28.6400