| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -1.27 | 122 |
| 2015 | 3.73 | 58 |
| 2014 | 2.98 | 81 |
| 2013 | 5.79 | 46 |
| 2012 | 2.56 | 130 |
| 2011 | 7.65 | 52 |
| 2010 | 8.18 | 25 |
| 2009 | 3.41 | 83 |
| 2008 | 8.95 | 88 |
| 2007 | 4.41 | 105 |
| 2006 | 2.89 | 122 |
| 2005 | 0.64 | 169 |
| 2004 | 6.96 | 50 |
| 2003 | 4.72 | 69 |
| 2002 | 1.06 | 139 |
| 2001 | 3.15 | 103 |
| 2000 | -.79 | 154 |
| 1999 | 0.65 | 131 |
| 1998 | 8.67 | 50 |
| 1997 | 13.96 | 36 |
| 1996 | 18.68 | 42 |
| 1995 | 175.95 | 10 |
| 1994 | 3373.47 | 2 |