1953 01 28.40  23.60  26.00 
1953 02 28.70  23.00  25.85 
1953 03 28.80  23.20  26.00 
1953 04 30.30  24.80  27.55 
1953 05 29.90  25.00  27.45 
1953 06 30.10  25.30  27.70 
1953 07 29.90  24.50  27.20 
1953 08 30.40  24.80  27.59 
1953 09 30.70  24.90  27.80 
1953 10 30.70  24.40  27.55 
1953 11 30.60  23.80  27.20 
1953 12 29.60  23.70  26.65 
1954 01 28.70  23.30  26.00 
1954 02 29.00  22.90  25.95 
1954 03 28.80  23.90  26.34 
1954 04 29.20  25.30  27.25 
1954 05 30.10  25.10  27.60 
1954 06 30.30  25.00  27.65 
1954 07 30.20  24.80  27.50 
1954 08 30.90  24.80  27.84 
1954 09 30.90  23.90  27.40 
1954 10 30.30  24.30  27.30 
1954 11 29.80  23.70  26.75 
1954 12 29.10  22.60  25.85 
1955 01 29.10  22.10  25.60 
1955 02 28.40  22.20  25.30 
1955 03 28.90  23.70  26.30 
1955 04 30.00  24.60  27.30 
1955 05 30.40  24.80  27.59 
1955 06 30.10  24.60  27.35 
1955 07 30.20  24.70  27.45 
1955 08 31.00  24.40  27.70 
1955 09 30.60  23.70  27.15 
1955 10 30.80  23.80  27.30 
1955 11 30.30  23.20  26.75 
1955 12 29.70  23.90  26.80 
1956 01 29.60  23.20  26.40 
1956 02 28.80  22.90  25.84 
1956 03 29.40  23.70  26.55 
1956 04 30.20  24.40  27.30 
1956 05 30.10  24.70  27.40 
1956 06 30.40  24.60  27.50 
1956 07 29.80  24.20  27.00 
1956 08 30.50  24.20  27.35 
1956 09 30.50  24.60  27.55 
1956 10 30.60  24.10  27.35 
1956 11 30.30  22.50  26.40 
1956 12 29.30  23.70  26.50 
