| | 1981 | | 1982 | | 1983 | | 1984 | | 1985 | | | 1986 | | 1987 | | 1988 | | 1989 | | 1990 | | | 1991 | | 1992 | | 1993 | | 1994 | | 1995 | | | 1996 | | 1997 | | 1998 | | 1999 | | 2000 | | | 2001 | | 2002 | | 2003 | | 2004 | | 2005 | | | 2006 | | 2007 | | 2008 | | |
|
| | | | | | -0.27 | -2.73 | -0.5 | 0.53 | 5.47 | | 0.94 | 3.92 | 7.4 | 0.13 | 0.53 | | 3.35 | 8.31 | 16.4 | 0.20 | 0.51 | | 8.03 | 9.10 | 17.4 | 0.46 | 0.52 | | 3.14 | 3.19 | 8.7 | 0.36 | 0.37 | | | | | | | 8.53 | 7.45 | 8.0 | 1.07 | 0.93 | | 3.16 | 8.76 | 9.6 | 0.33 | 0.91 | | 5.53 | 7.12 | 12.8 | 0.43 | 0.56 | | 1.55 | 3.65 | 4.4 | 0.35 | 0.83 | | 2.13 | 6.33 | 5.2 | 0.41 | 1.22 | | | | | | | 5.99 | 7.75 | 9.9 | 0.60 | 0.78 | | 4.02 | 9.70 | 11.3 | 0.36 | 0.86 | | 9.28 | 9.33 | 12.3 | 0.75 | 0.76 | | 3.72 | 7.87 | 13.7 | 0.27 | 0.57 | | 4.35 | 7.85 | 12.0 | 0.36 | 0.65 | | | | | | | 5.69 | 5.98 | 9.0 | 0.63 | 0.66 | | -0.41 | 9.23 | 10.1 | -0.04 | 0.91 | | 2.39 | 5.02 | 9.5 | 0.25 | 0.53 | | 2.59 | 8.14 | 10.9 | 0.24 | 0.75 | | 6.08 | 9.53 | 11.8 | 0.51 | 0.81 | | | | | | | 2.06 | 5.68 | 11.7 | 0.18 | 0.49 | | 4.89 | 9.54 | 11.5 | 0.43 | 0.83 | | 4.78 | 5.71 | 11.0 | 0.44 | 0.52 | | 10.57 | 10.60 | 14.1 | 0.75 | 0.75 | | 7.44 | 11.16 | 11.8 | 0.63 | 0.95 | | | | | | | 6.92 | 9.16 | 12.8 | 0.54 | 0.72 | | 6.45 | 9.06 | 13.3 | 0.48 | 0.68 | | 0.93 | 3.40 | 9.0 | 0.10 | 0.38 | | | | | | | | | | | |