| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 73.24 | 42 |
| 2015 | 72 | 50 |
| 2014 | 69.98 | 47 |
| 2013 | 69.05 | 46 |
| 2012 | 80.6 | 29 |
| 2011 | 77.62 | 34 |
| 2010 | 77.49 | 38 |
| 2009 | 68.19 | 51 |
| 2008 | 65.3 | 46 |
| 2007 | 67.5 | 42 |
| 2006 | 62.46 | 46 |
| 2005 | 57.65 | 52 |
| 2004 | 56.17 | 53 |
| 2003 | 55.47 | 55 |
| 2002 | 54.89 | 54 |
| 2001 | 54.6 | 53 |
| 2000 | 40.27 | 70 |
| 1999 | 33.8 | 85 |
| 1998 | 35.39 | 80 |
| 1997 | 34.54 | 78 |
| 1996 | 28.46 | 90 |
| 1995 | 20.96 | 108 |