| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.77 | 68 |
| 2015 | 2.33 | 89 |
| 2014 | 3.12 | 80 |
| 2013 | 8.16 | 28 |
| 2012 | -16.09 | 172 |
| 2011 | 2.05 | 115 |
| 2010 | -13.38 | 169 |
| 2009 | 3.4 | 69 |
| 2008 | 21.99 | 9 |
| 2007 | 2.15 | 103 |
| 2006 | -.54 | 127 |
| 2005 | 0.96 | 105 |
| 2004 | 6.75 | 47 |
| 2003 | 12.14 | 12 |
| 2002 | 0.68 | 103 |
| 2001 | -11.21 | 162 |
| 2000 | 1.02 | 97 |
| 1999 | 0.9 | 111 |
| 1998 | 3.29 | 69 |
| 1997 | 3.03 | 67 |
| 1996 | -2.05 | 129 |
| 1995 | 2.08 | 77 |
| 1994 | 7.44 | 25 |
| 1993 | -18.82 | 129 |
| 1992 | -.45 | 81 |
| 1991 | 18.88 | 4 |