| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -1.54 | 124 |
| 2015 | -.59 | 151 |
| 2014 | 1.07 | 116 |
| 2013 | 3.99 | 74 |
| 2012 | 3.33 | 102 |
| 2011 | 5.79 | 73 |
| 2010 | 6.09 | 52 |
| 2009 | 5.59 | 52 |
| 2008 | 7.85 | 107 |
| 2007 | 4.84 | 95 |
| 2006 | 6.58 | 64 |
| 2005 | 8.99 | 42 |
| 2004 | 11.88 | 23 |
| 2003 | 15.27 | 19 |
| 2002 | 22.54 | 9 |
| 2001 | 34.47 | 10 |
| 2000 | 45.67 | 9 |
| 1999 | 45.8 | 10 |
| 1998 | 59.1 | 5 |
| 1997 | 154.76 | 4 |
| 1996 | 38.83 | 18 |
| 1995 | 32.24 | 30 |
| 1994 | 136.76 | 12 |
| 1993 | 255.17 | 11 |
| 1992 | 211.21 | 6 |
| 1991 | 230.62 | 6 |