1991 01 99.99  22.60 -99.99 
1991 02 99.99  21.80 -99.99 
1991 03 99.99  22.30 -99.99 
1991 04 99.99  22.50 -99.99 
1991 05 99.99  22.80 -99.99 
1991 07 99.99  20.80 -99.99 
1991 08 99.99  20.80 -99.99 
1991 09 99.99  21.10 -99.99 
1991 10 99.99  20.60 -99.99 
1991 11 99.99  21.00 -99.99 
1991 12 99.99  21.70 -99.99 
1992 02 31.80  22.00  26.90 
1992 03 32.30  22.40  27.34 
1992 04 31.80  22.40  27.09 
1992 05 31.20  22.40  26.80 
1992 06 31.40  21.10  26.25 
1992 07 30.10  20.90  25.50 
1992 08 28.00  20.90  24.45 
1992 11 30.70  21.80  26.25 
1992 12 30.70  21.90  26.30 
1993 01 31.90  22.60  27.25 
1993 03 30.60  22.00  26.30 
1993 04 31.20  22.00  26.60 
1993 05 30.80  22.60  26.70 
1993 06 31.70  21.70  26.70 
1993 07 30.30  21.70  26.00 
1993 08 30.80  21.30  26.05 
1993 09 30.70  22.00  26.35 
1993 11 30.70  22.30  26.50 
1993 12 30.50  21.90  26.20 
1994 01 30.80  22.20  26.50 
1994 02 31.60  21.70  26.65 
1994 03 31.10  22.50  26.80 
1994 04 31.30  22.50  26.90 
1994 05 31.30  22.30  26.80 
1994 06 30.80  27.30  29.05 
1994 07 30.40  20.90  25.65 
1994 08 29.30  21.00  25.15 
1994 10 28.70  22.00  25.35 
1994 11 30.30  22.90  26.59 
1994 12 30.50  22.10  26.30 
1999 02 31.20  22.20  26.70 
1999 03 31.00  22.40  26.70 
1999 04 31.70  22.00  26.85 
1999 05 31.30  22.00  26.65 
1999 06 31.20  21.50  26.35 
1999 07 30.40  20.80  25.59 
1999 08 30.60  21.40  26.00 
1999 10 29.90  22.20  26.05 
1999 11 29.70  21.90  25.80 
2000 01 31.30  22.70  27.00 
2000 02 31.30  21.30  26.30 
2000 03 31.80  20.50  26.15 
2000 04 30.90  22.20  26.55 
2000 05 31.70  21.40  26.55 
2000 07 30.50 -99.99 -99.99 
2000 08 30.10  21.40  25.75 
2000 09 30.50  21.40  25.95 
2000 10 30.10  22.10  26.10 
2000 12 30.70  22.20  26.45 
