1986 11 99.99  22.50 -99.99 
1987 04 99.99  21.60 -99.99 
1987 06 99.99  22.00 -99.99 
1987 07 99.99  20.80 -99.99 
1987 08 99.99  21.10 -99.99 
1987 11 99.99  22.90 -99.99 
1987 12 99.99  23.00 -99.99 
1988 04 99.99  22.00 -99.99 
1988 05 99.99  23.20 -99.99 
1988 06 99.99  21.90 -99.99 
1988 07 99.99  21.90 -99.99 
1988 08 99.99  21.90 -99.99 
1988 11 99.99  22.70 -99.99 
1988 12 99.99  22.70 -99.99 
1989 02 99.99  22.60 -99.99 
1990 02 99.99  21.40 -99.99 
1990 12 99.99  21.40 -99.99 
1991 01 99.99  21.60 -99.99 
1991 02 99.99  22.20 -99.99 
1991 09 99.99  20.90 -99.99 
1991 10 99.99  20.70 -99.99 
1992 03 99.99  21.30 -99.99 
1992 06 99.99  22.60 -99.99 
1992 07 99.99  21.60 -99.99 
1992 08 99.99  20.70 -99.99 
1992 09 99.99  21.70 -99.99 
1992 10 99.99  22.40 -99.99 
1992 12 99.99  21.90 -99.99 
1993 01 99.99  21.40 -99.99 
1993 02 99.99  21.50 -99.99 
1993 04 99.99  21.80 -99.99 
1993 05 99.99  22.60 -99.99 
1993 06 99.99  22.40 -99.99 
1993 07 99.99  22.00 -99.99 
1993 08 99.99  20.80 -99.99 
1993 10 99.99  22.40 -99.99 
1993 12 99.99  23.00 -99.99 
1994 01 99.99  22.00 -99.99 
1994 02 99.99  21.60 -99.99 
1994 03 99.99  22.40 -99.99 
1994 04 99.99  22.60 -99.99 
1994 05 99.99  22.90 -99.99 
1994 06 99.99  22.50 -99.99 
1994 07 99.99  21.30 -99.99 
1994 08 99.99  21.10 -99.99 
1994 09 99.99  20.40 -99.99 
1994 10 99.99  21.60 -99.99 
1994 11 99.99  22.50 -99.99 
1994 12 99.99  22.60 -99.99 
1995 01 99.99  22.00 -99.99 
1995 02 99.99  21.90 -99.99 
1995 04 99.99  22.30 -99.99 
1995 05 99.99  23.10 -99.99 
1995 06 99.99  22.90 -99.99 
1995 07 99.99  22.10 -99.99 
1995 09 99.99  22.60 -99.99 
1995 12 99.99  23.00 -99.99 
1996 02 99.99  22.80 -99.99 
1996 03 99.99  22.60 -99.99 
1996 05 99.99  22.80 -99.99 
1996 06 99.99  22.50 -99.99 
1996 07 99.99  22.40 -99.99 
1996 08 99.99  22.30 -99.99 
1996 09 31.30  22.50  26.90 
1997 07 30.80  21.90  26.34 
