| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 95.28 | 23 |
| 2015 | 98.51 | 25 |
| 2014 | 102.72 | 25 |
| 2013 | 106.86 | 28 |
| 2012 | 111.45 | 24 |
| 2011 | 104.24 | 34 |
| 2010 | 89.33 | 38 |
| 2009 | 66.92 | 68 |
| 2008 | 73.85 | 77 |
| 2007 | 76.47 | 66 |
| 2006 | 82.51 | 55 |
| 2005 | 81.89 | 51 |
| 2004 | 77.26 | 56 |
| 2003 | 69.17 | 65 |
| 2002 | 66.32 | 70 |
| 2001 | 65.95 | 71 |
| 2000 | 63.87 | 73 |
| 1999 | 62.08 | 74 |
| 1998 | 69.69 | 57 |
| 1997 | 67.27 | 63 |
| 1996 | 63.06 | 71 |
| 1995 | 53.9 | 87 |