1917 1 16.1100 1917 2 15.5100 1917 3 17.0400 1917 4 16.6300 1917 5 17.9100 1917 6 18.1400 1917 7 17.0900 1917 8 17.7300 1917 9 17.9900 1917 10 19.1700 1917 11 20.4900 1917 12 19.9700 1918 1 17.8500 1918 2 18.7700 1918 3 19.9800 1918 4 20.4100 1918 5 22.1200 1918 6 22.2900 1918 7 21.9800 1918 8 23.1300 1918 9 23.9100 1918 10 25.1600 1918 11 23.6100 1918 12 24.9600 1919 1 24.2800 1919 2 25.6800 1919 3 24.3600 1919 4 23.8300 1919 5 23.7400 1919 6 24.0200 1919 7 23.7400 1919 8 24.8300 1919 9 25.9700 1919 10 25.8700 1919 11 26.4600 1919 12 27.7400 1920 1 28.3500 1920 2 28.6200 1920 3 29.3800 1920 4 29.2100 1920 5 29.4100 1920 6 30.6700 1920 7 28.9700 1920 8 30.3800 1920 9 30.7500 1920 10 30.7900 1920 11 29.6500 1920 12 27.5600 1921 1 23.4200 1921 2 24.3500 1921 3 24.8000 1921 4 25.1100 1921 5 24.4800 1921 6 24.1800 1921 7 22.8300 1921 8 23.5500 1921 9 23.1700 1921 10 22.0400 1921 11 22.0900 1921 12 22.7500 1922 1 20.0900 1922 2 22.7700 1922 3 22.4400 1922 4 22.9300 1922 5 23.4600 1922 6 24.1900 1922 7 21.9900 1922 8 23.1800 1922 9 23.6400 1922 10 23.9700 1922 11 25.0500 1922 12 25.1600 1923 1 24.3000 1923 2 25.3600 1923 3 25.5200 1923 4 25.6400 1923 5 26.6700 1923 6 26.4100 1923 7 25.6100 1923 8 26.4600 1923 9 25.8000 1923 10 27.0300 1923 11 26.6500 1923 12 26.3100 1924 1 24.9800 1924 2 27.0600 1924 3 26.7400 1924 4 26.4400 1924 5 25.5600 1924 6 24.1300 1924 7 23.0900 1924 8 24.5200 1924 9 24.8400 1924 10 25.6200 1924 11 25.0500 1924 12 25.9000 1925 1 24.5200 1925 2 26.4300 1925 3 26.5900 1925 4 26.2200 1925 5 26.4100 1925 6 25.7000 1925 7 25.3500 1925 8 25.6300 1925 9 25.1000 1925 10 26.6500 1925 11 26.7200 1925 12 26.6500 1926 1 24.8900 1926 2 26.4400 1926 3 26.8800 1926 4 26.4800 1926 5 25.9500 1926 6 25.8500 1926 7 24.8200 1926 8 26.0100 1926 9 25.6900 1926 10 26.6500 1926 11 25.5700 1926 12 25.1500 1927 1 23.5900 1927 2 26.0400 1927 3 26.4800 1927 4 26.5900 1927 5 26.4800 1927 6 25.3600 1927 7 24.6100 1927 8 25.7500 1927 9 25.1400 1927 10 25.6400 1927 11 24.8000 1927 12 25.5700 1928 1 24.6900 1928 2 26.6300 1928 3 26.8800 1928 4 26.3800 1928 5 26.4600 1928 6 26.1200 1928 7 25.6000 1928 8 26.5400 1928 9 26.1400 1928 10 27.2200 1928 11 25.9800 1928 12 26.2900 1929 1 25.3100 1929 2 27.5100 1929 3 27.6800 1929 4 28.0300 1929 5 27.7900 1929 6 27.1200 1929 7 25.2700 1929 8 27.3000 1929 9 26.6900 1929 10 26.6300 1929 11 25.0700 1929 12 24.7400 1930 1 23.7300 1930 2 25.6000 1930 3 25.8300 1930 4 25.7900 1930 5 25.4500 1930 6 24.7400 1930 7 22.9000 1930 8 22.2100 1930 9 22.5100 1930 10 22.4400 1930 11 21.5400 1930 12 21.4500 1931 1 19.5300 1931 2 22.4600 1931 3 23.0300 1931 4 22.9700 1931 5 22.5800 1931 6 21.1100 1931 7 20.0700 1931 8 19.9800 1931 9 18.2100 1931 10 18.6800 1931 11 18.4100 1931 12 18.4100 1932 1 17.5100 1932 2 18.1100 1932 3 17.9500 1932 4 16.4200 1932 5 16.5500 1932 6 15.2800 1932 7 14.8000 1932 8 14.4000 1932 9 14.1300 1932 10 14.9600 1932 11 14.7000 1932 12 14.5800 1933 1 14.3800 1933 2 13.9600 1933 3 13.5800 1933 4 14.2000 1933 5 15.5300 1933 6 16.2600 1933 7 16.5300 1933 8 18.2600 1933 9 17.5800 1933 10 17.5700 1933 11 16.3500 1933 12 16.3100 1934 1 16.3800 1934 2 18.1300 1934 3 . 1934 4 . 1934 5 . 1934 6 . 1934 7 . 1934 8 . 1934 9 . 1934 10 . 1934 11 . 1934 12 .