| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 52.47 | 72 |
| 2015 | 52.22 | 84 |
| 2014 | 58.88 | 67 |
| 2013 | 62.46 | 53 |
| 2012 | 56.25 | 62 |
| 2011 | 49.88 | 74 |
| 2010 | 51.66 | 75 |
| 2009 | 54.09 | 70 |
| 2008 | 50.35 | 73 |
| 2007 | 51.18 | 74 |
| 2006 | 43.7 | 82 |
| 2005 | 42.03 | 88 |
| 2004 | 36.75 | 91 |
| 2003 | 30.86 | 105 |
| 2002 | 28.99 | 105 |
| 2001 | 25.14 | 113 |
| 2000 | 22.29 | 113 |
| 1999 | 20.45 | 117 |
| 1998 | 20.04 | 118 |
| 1997 | 21.56 | 115 |
| 1996 | 18.34 | 124 |
| 1995 | 19.22 | 124 |