| 1978 |
| 1979 |
| 1980 |
| 1981 |
| 1982 |
| 1983 |
| 1984 |
| 1985 |
| 1986 |
| 1987 |
| 1988 |
| 1989 |
| 1990 |
| 1991 |
| 1992 |
| 1993 |
| 1994 |
| 1995 |
| 1996 |
| 1997 |
| 1998 |
| 1999 |
| 2000 |
| 2001 |
| 2002 |
| 2003 | |
| 0.54 |
4.5 |
10.18 |
21.4 |
17.35 |
28.9 |
| 0.63 |
5.1 |
9.34 |
19.8 |
17.54 |
27.8 |
| 0.69 |
5.5 |
8.95 |
19.5 |
17.26 |
28 |
| 0.69 |
5.9 |
8.51 |
18.8 |
16.5 |
27.9 |
| 0.77 |
4.7 |
8.35 |
18.6 |
15.94 |
27 |
| 0.82 |
4.7 |
8.45 |
19 |
15.25 |
26.7 |
| 0.87 |
5.2 |
8.54 |
20.4 |
14.82 |
26.7 |
| 0.99 |
5.3 |
9.12 |
20.7 |
14.62 |
26.3 |
| 1.08 |
5.3 |
9.45 |
20.9 |
14.42 |
26.2 |
| 1.12 |
5.4 |
9.71 |
20.4 |
14.16 |
25.8 |
| 1.16 |
5.2 |
10.12 |
18.3 |
14.39 |
25.4 |
| 1.16 |
5.3 |
10.28 |
17.4 |
14.65 |
25.6 |
| 1.16 |
5.2 |
10.36 |
18 |
13.46 |
27.7 |
| 1.12 |
5.3 |
10.62 |
18.6 |
13.5 |
26.9 |
| 1.11 |
5.6 |
10.97 |
18.8 |
13.63 |
26.1 |
| 1.11 |
6.6 |
11.27 |
18.3 |
13.77 |
26.1 |
| 1.13 |
7.7 |
11.75 |
18.8 |
13.98 |
26.2 |
| 1.15 |
8.1 |
12.57 |
19.3 |
14.34 |
25.3 |
| 1.15 |
8.4 |
13.43 |
19.3 |
14.85 |
24.5 |
| 1.16 |
8.8 |
13.46 |
19.4 |
15.4 |
23.93 |
| 1.18 |
9.6 |
14.66 |
17.8 |
15.69 |
23.28 |
| 1.31 |
11.55 |
15.4 |
17.73 |
16 |
22.71 |
| 1.9 |
11.17 |
14.83 |
18.24 |
16.04 |
22.05 |
| 2.22 |
13.2 |
17.08 |
18.48 |
15.99 |
21.66 |
| 2.6 |
15.12 |
18.01 |
18.35 |
16.01 |
21.47 |
| 2.99 |
16.21 |
18.82 |
18.04 |
15.91 |
21.39 | |
