| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 110.79 | 37 |
| 2014 | 125.13 | 30 |
| 2013 | 134.03 | 24 |
| 2012 | 139.68 | 26 |
| 2011 | 136.18 | 30 |
| 2010 | 133.23 | 23 |
| 2009 | 133.38 | 19 |
| 2008 | 146.11 | 19 |
| 2007 | 137.06 | 24 |
| 2006 | 120.75 | 39 |
| 2005 | 95.08 | 70 |
| 2004 | 93.82 | 69 |
| 2003 | 83.93 | 80 |
| 2002 | 82.92 | 79 |
| 2001 | 73.75 | 94 |
| 2000 | 89.43 | 63 |
| 1999 | 99.2 | 45 |
| 1998 | 94.51 | 55 |
| 1997 | 84.48 | 73 |
| 1996 | 87.3 | 63 |
| 1995 | 71.83 | 87 |
| 1994 | 73.83 | 75 |
| 1993 | 74.71 | 68 |
| 1992 | 83.18 | 55 |
| 1991 | 71.96 | 65 |
| 1990 | 78.75 | 55 |