| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 134.48 | 20 |
| 2014 | 150.75 | 20 |
| 2013 | 142.62 | 21 |
| 2012 | 139.51 | 27 |
| 2011 | 138.13 | 29 |
| 2010 | 127.39 | 29 |
| 2009 | 118.84 | 29 |
| 2008 | 131.46 | 34 |
| 2007 | 120.5 | 44 |
| 2006 | 119.47 | 40 |
| 2005 | 114.52 | 46 |
| 2004 | 118.81 | 42 |
| 2003 | 111.59 | 46 |
| 2002 | 124.72 | 27 |
| 2001 | 123.64 | 29 |
| 2000 | 148.77 | 16 |
| 1999 | 85.85 | 69 |
| 1998 | 63.34 | 106 |
| 1997 | 74.82 | 92 |
| 1996 | 79.79 | 77 |
| 1995 | 78.02 | 75 |
| 1994 | 68 | 86 |
| 1993 | 78.91 | 60 |
| 1992 | 78.83 | 60 |
| 1991 | 58.91 | 87 |