1981   298.63 298.53 298.60 298.66 298.70 298.71 298.52 298.67 298.67 298.53 298.59 298.59 298.58 298.67 298.56
1982   298.73 298.78 298.84 298.74 298.69 298.79 298.70 298.85 298.72 298.66 298.75 298.77 298.78 298.60 298.73
1983   298.84 298.78 298.76 298.70 298.72 298.82 298.81 298.63 298.78 298.80 298.62 298.71 298.67 298.69 298.63
1984   298.59 298.63 298.64 298.60 298.54 298.53 298.58 298.52 298.56 298.61 298.52 298.54 298.57 298.58 298.55
1985   298.35 298.38 298.35 298.52 298.51 298.55 298.41 298.61 298.48 298.43 298.44 298.48 298.41 298.58 298.47
1986   298.60 298.59 298.60 298.66 298.61 298.69 298.67 298.60 298.63 298.74 298.65 298.72 298.67 298.56 298.68
1987   298.87 298.75 298.89 298.94 298.79 298.74 298.83 298.83 298.69 298.87 298.81 298.78 298.88 298.78 298.85
1988   298.61 298.56 298.57 298.50 298.62 298.59 298.72 298.68 298.51 298.58 298.63 298.58 298.64 298.57 298.60
1989   298.49 298.57 298.54 298.67 298.49 298.68 298.68 298.54 298.59 298.46 298.55 298.53 298.56 298.51 298.55
1990   298.84 298.75 298.85 298.76 298.82 298.84 298.77 298.83 298.81 298.71 298.75 298.79 298.76 298.60 298.79
1991   298.74 298.67 298.77 298.75 298.72 298.78 298.63 298.69 298.74 298.68 298.75 298.82 298.76 298.78 298.76
1992   298.76 298.76 298.78 298.70 298.70 298.77 298.59 298.86 298.76 298.75 298.89 298.82 298.75 298.81 298.91
1993   298.78 298.57 298.67 298.68 298.69 298.76 298.77 298.93 298.65 298.67 298.82 298.77 298.79 298.84 298.73
1994   298.59 298.58 298.50 298.56 298.64 298.65 298.56 298.59 298.57 298.48 298.65 298.51 298.55 298.52 298.55
1995   298.59 298.60 298.54 298.55 298.56 298.67 298.71 298.56 298.60 298.49 298.49 298.61 298.62 298.67 298.64
1996   298.56 298.76 298.63 298.56 298.44 298.66 298.59 298.69 298.59 298.74 298.58 298.77 298.70 298.65 298.71
1997   298.70 298.73 298.79 298.77 298.81 298.72 298.87 298.76 299.00 298.86 298.84 298.78 298.81 298.85 298.77
1998   298.83 298.78 298.76 298.80 298.80 298.79 298.87 298.79 298.65 298.84 298.76 298.80 298.86 298.71 298.68
1999   298.60 298.52 298.52 298.34 298.49 298.44 298.46 298.55 298.48 298.40 298.49 298.41 298.42 298.42 298.45
2000   298.44 298.48 298.39 298.43 298.39 298.53 298.46 298.49 298.54 298.51 298.45 298.52 298.46 298.67 298.39
2001   298.77 298.66 298.84 298.68 298.70 298.68 298.78 298.60 298.72 298.65 298.80 298.70 298.74 298.82 298.79
2002   298.90 298.92 298.78 298.79 298.77 298.80 298.87 298.86 298.75 298.74 298.96 298.99 298.91 298.66 298.81
2003   298.51 298.62 298.61 298.62 298.66 298.72 298.61 298.73 298.68 298.66 298.72 298.72 298.63 298.60 298.81
2004   298.78 298.89 298.80 298.77 298.67 298.84 298.89 298.85 298.81 298.95 298.33 298.86 298.80 298.83 298.82
2005   298.75 298.79 298.72 298.70 298.76 298.76 298.85 298.66 298.66 298.72 298.77 298.63 298.88 298.74 298.72
2006   298.72 298.65 298.69 298.64 298.71 298.66 298.79 298.71 298.73 298.70 298.72 298.77 298.72 298.74 298.78
2007   298.49 298.58 298.57 298.57 298.45 298.62 298.50 298.65 298.55 298.49 298.51 298.51 298.65 298.63 298.65
2008   298.49 298.43 298.45 298.45 298.36 298.34 298.44 298.52 298.44 298.38 298.49 298.46 298.43 298.49 298.56
2009   298.69 298.73 298.82 298.74 298.61 298.52 298.77 298.65 298.62 298.63 298.70 298.58 298.59 298.59 298.69