1991 05 99.99  23.40 -99.99 
1991 06 99.99  21.90 -99.99 
1992 05 32.50  22.60  27.55 
1992 07 32.90  21.40  27.15 
1992 08 32.40  22.40  27.40 
1992 09 31.80  21.00  26.40 
1992 10 31.80  21.90  26.84 
1992 11 30.40  21.60  26.00 
1992 12 30.80  21.70  26.25 
1993 01 30.60  20.80  25.70 
1993 02 30.90  21.60  26.25 
1993 04 32.20  22.10  27.15 
1993 07 32.40  22.80  27.60 
1993 10 31.50  22.40  26.95 
1994 01 30.50  22.10  26.30 
1994 02 30.80  22.60  26.70 
1994 03 31.00  22.70  26.85 
1994 06 33.90  22.90  28.40 
1994 07 34.00  22.10  28.05 
1994 09 33.50  22.40  27.95 
1994 10 30.40  22.30  26.34 
1994 11 30.00  22.80  26.40 
1994 12 31.20  21.20  26.20 
1995 01 30.80  22.30  26.55 
1995 02 31.30  22.10  26.70 
1995 03 32.00  22.30  27.15 
1995 06 32.50  22.40  27.45 
1995 07 33.50  22.30  27.90 
1995 08 32.09  22.70  27.40 
1996 01 31.00  21.10  26.05 
1996 02 30.50  22.00  26.25 
1996 03 32.40  22.40  27.40 
1996 04 32.40  22.70  27.55 
