| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 83.4 | 36 |
| 2015 | 82.95 | 38 |
| 2014 | 102.15 | 26 |
| 2013 | 110.81 | 23 |
| 2012 | 110.03 | 27 |
| 2011 | 100.68 | 36 |
| 2010 | 103.84 | 23 |
| 2009 | 100.49 | 18 |
| 2008 | 115.33 | 23 |
| 2007 | 108.08 | 26 |
| 2006 | 99.58 | 37 |
| 2005 | 72.11 | 74 |
| 2004 | 75.05 | 61 |
| 2003 | 67.68 | 67 |
| 2002 | 66.78 | 68 |
| 2001 | 61.83 | 75 |
| 2000 | 77.32 | 54 |
| 1999 | 84.38 | 37 |
| 1998 | 82.38 | 40 |
| 1997 | 74.27 | 51 |
| 1996 | 73.49 | 49 |
| 1995 | 56.05 | 82 |
| 1994 | 39.02 | 120 |