| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.38 | 74 |
| 2015 | 1.55 | 68 |
| 2014 | 1.59 | 69 |
| 2013 | 1.66 | 61 |
| 2012 | 1.69 | 59 |
| 2011 | 1.78 | 52 |
| 2010 | 1.7 | 62 |
| 2009 | 1.8 | 62 |
| 2008 | 1.84 | 61 |
| 2007 | 1.63 | 72 |
| 2006 | 1.68 | 73 |
| 2005 | 1.76 | 71 |
| 2004 | 1.76 | 73 |
| 2003 | 2.05 | 64 |
| 2002 | 2.73 | 40 |
| 2001 | 2.7 | 44 |
| 2000 | 3.03 | 35 |
| 1999 | 4.43 | 20 |
| 1998 | 5.61 | 12 |
| 1997 | 7.54 | 6 |
| 1996 | 8.19 | 6 |
| 1995 | 9.2 | 5 |