| 时间 |
值 （%） |
世界排名 |
| 2010 |
8 |
100 |
| 2009 |
8 |
106 |
| 2008 |
8 |
113 |
| 2007 |
8 |
117 |
| 2006 |
8 |
111 |
| 2005 |
8.125 |
104 |
| 2004 |
8.5 |
104 |
| 2003 |
7.417 |
114 |
| 2002 |
6.771 |
127 |
| 2001 |
7.667 |
124 |
| 2000 |
9.458 |
115 |
| 1999 |
11.333 |
104 |
| 1998 |
14 |
86 |
| 1997 |
14.542 |
79 |
| 1996 |
12.875 |
88 |
| 1990 |
14.417 |
53 |
| 1989 |
15 |
45 |
| 1988 |
15 |
36 |
| 1987 |
15 |
33 |
| 1986 |
15.667 |
27 |