| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 49.75 | 100 |
| 2015 | 61.45 | 77 |
| 2014 | 63.18 | 84 |
| 2013 | 68.37 | 79 |
| 2012 | 75.08 | 69 |
| 2011 | 70.47 | 76 |
| 2010 | 54.02 | 111 |
| 2009 | 58.37 | 87 |
| 2008 | 91.04 | 47 |
| 2007 | 99.11 | 37 |
| 2006 | 94.54 | 39 |
| 2005 | 97.37 | 36 |
| 2004 | 105.14 | 26 |
| 2003 | 102.79 | 21 |
| 2002 | 111.38 | 15 |
| 2001 | 140.04 | 10 |
| 2000 | 147.76 | 11 |
| 1999 | 108.75 | 18 |
| 1998 | 60.25 | 75 |
| 1997 | 91.02 | 27 |
| 1996 | 126.51 | 12 |
| 1995 | 130.73 | 11 |
| 1994 | 141.15 | 8 |