1981   298.59 298.67 298.63 298.60 298.59 298.58 298.52 298.59 298.73 298.60 298.55 298.63 298.64 298.58 298.55
1982   298.78 298.82 298.67 298.69 298.72 298.77 298.74 298.63 298.71 298.70 298.68 298.68 298.63 298.67 298.65
1983   298.77 298.89 298.88 298.89 298.84 299.00 298.88 298.97 298.92 298.95 298.86 298.90 298.89 298.95 298.89
1984   298.52 298.59 298.60 298.58 298.59 298.57 298.50 298.47 298.59 298.54 298.48 298.50 298.58 298.53 298.52
1985   298.50 298.55 298.53 298.44 298.45 298.57 298.56 298.41 298.52 298.54 298.50 298.43 298.52 298.46 298.52
1986   298.64 298.62 298.51 298.67 298.63 298.52 298.53 298.52 298.45 298.63 298.55 298.60 298.65 298.59 298.60
1987   298.75 298.77 298.76 298.78 298.80 298.89 298.85 298.84 298.77 298.82 298.82 298.85 298.79 298.86 298.82
1988   298.76 298.67 298.78 298.67 298.67 298.53 298.58 298.64 298.62 298.73 298.52 298.63 298.64 298.62 298.53
1989   298.53 298.58 298.64 298.58 298.52 298.56 298.64 298.61 298.64 298.62 298.54 298.46 298.53 298.49 298.47
1990   298.70 298.73 298.75 298.74 298.74 298.65 298.60 298.71 298.70 298.76 298.76 298.60 298.64 298.76 298.70
1991   298.88 298.73 298.92 298.79 298.83 298.70 298.79 298.72 298.72 298.77 298.89 298.84 298.83 298.85 298.81
1992   298.70 298.90 298.91 298.92 298.82 298.84 298.79 298.74 298.88 298.85 298.83 298.76 298.76 298.71 298.77
1993   298.73 298.72 298.75 298.79 298.82 298.74 298.79 298.74 298.81 298.82 298.82 298.75 298.72 298.81 298.78
1994   298.62 298.60 298.66 298.73 298.73 298.61 298.59 298.58 298.63 298.58 298.62 298.51 298.54 298.63 298.64
1995   298.71 298.65 298.62 298.65 298.69 298.55 298.61 298.61 298.63 298.52 298.61 298.68 298.59 298.55 298.57
1996   298.65 298.63 298.57 298.60 298.62 298.59 298.54 298.64 298.63 298.56 298.54 298.54 298.59 298.62 298.64
1997   298.95 298.76 298.89 298.83 298.77 298.97 298.84 298.86 298.89 298.85 298.95 298.89 299.05 298.97 298.93
1998   298.78 298.72 298.81 298.74 298.77 298.72 298.85 298.79 298.81 298.79 298.77 298.80 298.77 298.74 298.72
1999   298.36 298.44 298.47 298.46 298.40 298.49 298.47 298.49 298.49 298.42 298.46 298.42 298.48 298.45 298.51
2000   298.50 298.48 298.37 298.48 298.53 298.44 298.44 298.62 298.52 298.46 298.57 298.53 298.56 298.53 298.45
2001   298.80 298.71 298.71 298.71 298.64 298.76 298.70 298.66 298.68 298.71 298.67 298.66 298.68 298.63 298.70
2002   298.76 298.68 298.76 298.74 298.67 298.89 298.85 298.91 298.91 298.93 298.66 298.63 298.70 298.70 298.74
2003   298.56 298.73 298.59 298.70 298.60 298.69 298.70 298.71 298.75 298.64 298.60 298.57 298.46 298.58 298.53
2004   298.73 298.59 298.77 298.73 298.80 298.87 298.76 298.83 298.73 298.68 298.64 298.75 298.67 298.65 298.68
2005   298.79 298.76 298.79 298.81 298.71 298.81 298.77 298.84 298.82 298.78 298.81 298.74 298.77 298.66 298.82
2006   298.87 298.89 298.72 298.75 298.77 298.75 298.76 298.83 298.71 298.80 298.79 298.78 298.77 298.72 298.79
2007   298.52 298.60 298.55 298.60 298.53 298.68 298.69 298.58 298.54 298.55 298.60 298.54 298.55 298.53 298.58
2008   298.52 298.49 298.64 298.60 298.66 298.59 298.63 298.52 298.58 298.55 298.63 298.64 298.57 298.68 298.66
2009   298.77 298.76 298.62 298.73 298.71 298.75 298.80 298.77 298.77 298.75 298.65 298.71 298.71 298.75 298.72