1981   298.62 298.70 298.67 298.67 298.66 298.80 298.78 298.68 298.85 298.72 298.76 298.71 298.75 298.74 298.69
1982   298.53 298.77 298.66 298.68 298.66 298.65 298.60 298.74 298.84 298.78 298.66 298.81 298.79 298.57 298.77
1983   298.77 298.79 298.79 298.86 298.74 298.74 298.82 298.91 298.76 298.81 298.78 298.84 298.83 298.80 298.70
1984   298.55 298.55 298.59 298.63 298.52 298.62 298.58 298.50 298.52 298.58 298.62 298.49 298.66 298.65 298.54
1985   298.52 298.57 298.67 298.60 298.52 298.48 298.53 298.47 298.53 298.42 298.50 298.36 298.40 298.49 298.40
1986   298.69 298.50 298.62 298.70 298.61 298.52 298.57 298.74 298.69 298.56 298.77 298.66 298.58 298.71 298.66
1987   298.87 298.64 298.65 298.73 298.75 298.88 298.67 298.78 298.75 298.77 298.73 298.78 298.82 298.83 298.65
1988   298.72 298.79 298.84 298.77 298.71 298.76 298.77 298.72 298.64 298.57 298.60 298.64 298.57 298.54 298.50
1989   298.58 298.47 298.49 298.51 298.56 298.55 298.55 298.39 298.55 298.51 298.45 298.49 298.56 298.47 298.60
1990   298.79 298.81 298.86 298.74 298.74 298.69 298.73 298.91 298.71 298.67 298.87 298.73 298.71 298.95 298.91
1991   298.59 298.89 298.73 298.74 298.83 298.77 298.74 298.76 298.81 298.83 298.89 298.77 298.71 298.73 298.75
1992   298.96 298.76 298.70 298.88 298.64 298.74 298.74 298.83 298.80 298.85 298.76 298.77 298.74 298.74 298.82
1993   298.66 298.57 298.65 298.50 298.67 298.69 298.64 298.72 298.61 298.59 298.62 298.61 298.72 298.68 298.58
1994   298.66 298.66 298.74 298.60 298.68 298.50 298.59 298.47 298.68 298.60 298.56 298.53 298.65 298.62 298.58
1995   298.74 298.60 298.62 298.60 298.61 298.66 298.75 298.59 298.62 298.58 298.45 298.65 298.55 298.64 298.53
1996   298.79 298.68 298.71 298.54 298.69 298.66 298.56 298.68 298.73 298.66 298.66 298.76 298.56 298.68 298.55
1997   298.86 298.79 298.56 298.70 298.81 298.68 298.78 298.84 298.83 298.52 298.66 298.79 298.76 298.87 298.75
1998   298.89 298.79 298.92 298.78 298.85 298.74 298.85 298.79 298.94 298.84 298.85 298.87 298.81 298.69 298.76
1999   298.48 298.50 298.58 298.52 298.60 298.46 298.43 298.53 298.51 298.51 298.53 298.47 298.41 298.53 298.47
2000   298.54 298.45 298.46 298.41 298.43 298.46 298.64 298.52 298.41 298.40 298.44 298.59 298.35 298.59 298.50
2001   298.61 298.77 298.80 298.70 298.69 298.62 298.57 298.64 298.79 298.71 298.62 298.76 298.70 298.73 298.67
2002   298.86 298.85 298.76 298.89 298.76 298.65 298.93 298.65 298.89 298.81 298.97 298.97 298.81 298.76 298.82
2003   298.78 298.66 298.62 298.71 298.63 298.60 298.78 298.77 298.65 298.59 298.81 298.71 298.87 298.85 298.68
2004   298.83 298.65 298.80 298.83 298.70 298.64 298.71 298.70 298.70 298.85 298.81 298.60 298.80 298.75 298.78
2005   298.93 298.81 298.64 298.78 298.72 298.62 298.77 298.93 298.73 298.78 298.74 298.66 298.87 298.86 298.82
2006   298.71 298.64 298.53 298.64 298.71 298.65 298.68 298.72 298.67 298.73 298.64 298.71 298.72 298.66 298.53
2007   298.79 298.63 298.68 298.63 298.62 298.65 298.67 298.62 298.62 298.64 298.67 298.56 298.65 298.49 298.58
2008   298.49 298.47 298.52 298.46 298.43 298.51 298.45 298.59 298.47 298.40 298.40 298.42 298.39 298.45 298.30
2009   298.55 298.61 298.68 298.63 298.63 298.59 298.60 298.50 298.69 298.60 298.61 298.62 298.88 298.73 298.59