| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 92.6 | 23 |
| 2015 | 80.8 | 41 |
| 2014 | 67.4 | 50 |
| 2013 | 62.57 | 52 |
| 2012 | 58.65 | 56 |
| 2011 | 59.38 | 59 |
| 2010 | 67.27 | 51 |
| 2009 | 76.84 | 41 |
| 2008 | 53.63 | 67 |
| 2007 | 54.09 | 70 |
| 2006 | 51.34 | 67 |
| 2005 | 57.75 | 51 |
| 2004 | 72.1 | 35 |
| 2003 | 72.5 | 34 |
| 2002 | 76.06 | 33 |
| 2001 | 77.83 | 29 |
| 2000 | 85.73 | 16 |
| 1999 | 77.04 | 22 |