| 时间 |
值 （%） |
世界排名 |
| 2010 |
22.613 |
10 |
| 2009 |
24.775 |
8 |
| 2008 |
24 |
9 |
| 2007 |
28.5 |
5 |
| 2006 |
30 |
6 |
| 2005 |
26.833 |
10 |
| 2004 |
29.25 |
13 |
| 2003 |
30.5 |
11 |
| 2002 |
29.333 |
15 |
| 2001 |
26.167 |
19 |
| 2000 |
32 |
15 |
| 1999 |
32 |
21 |
| 1998 |
29.278 |
30 |
| 1996 |
27 |
33 |
| 1995 |
25.67 |
34 |
| 1994 |
24 |
33 |
| 1993 |
25.33 |
35 |
| 1992 |
26 |
25 |
| 1991 |
26 |
24 |