1947 1 46.6900 1947 2 47.1500 1947 3 47.9700 1947 4 48.2600 1947 5 48.8100 1947 6 49.4800 1947 7 49.4300 1947 8 49.7400 1947 9 51.3700 1947 10 51.8500 1947 11 53.0300 1947 12 54.1200 1948 1 52.9800 1948 2 53.2600 1948 3 53.5300 1948 4 53.3500 1948 5 54.1200 1948 6 54.9200 1948 7 54.7400 1948 8 55.8400 1948 9 57.1500 1948 10 57.2600 1948 11 57.8700 1948 12 58.0500 1949 1 55.5600 1949 2 55.0500 1949 3 55.1400 1949 4 54.1300 1949 5 54.4200 1949 6 54.6700 1949 7 54.3300 1949 8 55.1600 1949 9 57.4500 1949 10 58.1700 1949 11 58.0400 1949 12 58.5200 1950 1 56.6500 1950 2 57.0500 1950 3 58.1500 1950 4 58.4000 1950 5 58.6300 1950 6 60.2000 1950 7 60.2900 1950 8 62.4600 1950 9 64.1400 1950 10 64.7200 1950 11 66.0500 1950 12 68.0400 1951 1 65.8400 1951 2 65.4800 1951 3 66.7200 1951 4 66.9900 1951 5 66.5900 1951 6 66.9600 1951 7 65.9100 1951 8 65.8000 1951 9 67.3000 1951 10 66.7800 1951 11 67.4100 1951 12 68.6400 1952 1 66.5700 1952 2 66.5700 1952 3 67.3600 1952 4 65.9000 1952 5 67.3300 1952 6 68.5800 1952 7 67.9600 1952 8 69.8900 1952 9 71.7400 1952 10 72.9000 1952 11 73.3900 1952 12 74.9100 1953 1 72.6400 1953 2 72.9200 1953 3 74.2700 1953 4 74.0200 1953 5 74.6000 1953 6 75.1400 1953 7 74.5800 1953 8 76.0200 1953 9 77.9700 1953 10 77.9300 1953 11 77.1400 1953 12 78.3100 1954 1 75.2200 1954 2 74.7000 1954 3 75.2000 1954 4 . 1954 5 . 1954 6 . 1954 7 . 1954 8 . 1954 9 . 1954 10 . 1954 11 . 1954 12 .