1997 01 26.70 -99.99 -99.99 
1997 05 31.70  22.60  27.15 
1997 06 31.50  24.50  28.00 
1997 07 31.70  24.00  27.85 
1997 08 33.90 -99.99 -99.99 
1997 10 32.90  24.10  28.50 
1997 11 31.70  23.70  27.70 
1997 12 31.10  23.60  27.35 
1998 01 28.90  24.10  26.50 
1998 02 30.00  23.90  26.95 
1998 03 29.90  23.90  26.90 
1998 04 31.10  23.90  27.50 
1998 05 31.40  24.00  27.70 
1998 06 31.30  24.00  27.65 
1998 07 31.10  23.80  27.45 
1998 09 32.00  24.30  28.15 
1998 10 31.70  22.80  27.25 
1998 11 31.00  22.90  26.95 
1998 12 30.90  23.60  27.25 
1999 01 31.10  23.40  27.25 
1999 02 30.00  23.00  26.50 
1999 03 31.20  23.20  27.20 
1999 04 31.20  23.40  27.30 
1999 09 31.50  23.30  27.40 
1999 10 31.30  23.00  27.15 
1999 11 31.10  23.10  27.10 
2000 01 30.50  23.30  26.90 
2000 02 31.70  23.20  27.45 
2000 03 30.50  23.30  26.90 
2000 04 32.20  22.50  27.35 
2000 05 30.30  23.00  26.65 
2000 06 31.20  23.10  27.15 
2000 07 31.20  23.10  27.15 
2000 11 33.20  23.10  28.15 
2001 03 31.00  23.00  27.00 
2001 08 31.10  23.90  27.50 
2001 09 31.50  23.40  27.45 
2001 11 31.40  23.50  27.45 
2002 02 29.80  23.60  26.70 
2002 03 30.30  23.70  27.00 
2002 06 31.30  23.80  27.55 
2002 09 32.30  23.50  27.90 
2003 01 99.99  23.60 -99.99 
2003 02 99.99  23.40 -99.99 
2003 03 99.99  23.30 -99.99 
2003 04 99.99  23.70 -99.99 
2003 06 31.70   2.30  17.00 
2003 07 30.80  23.60  27.20 
2003 10 31.70  23.70  27.70 
2003 12 31.50  23.60  27.55 
2004 01 30.20  23.00  26.60 
2004 02 30.20  23.80  27.00 
2004 03 30.50  23.90  27.20 
2004 04 31.30  23.40  27.34 
2004 06 30.20  24.00  27.10 
2004 07 30.30  23.50  26.90 
2004 08 30.80  23.50  27.15 
2004 09 31.10  24.10  27.60 
