| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -5.8 | 125 |
| 2015 | 13.2 | 5 |
| 2014 | 6.1 | 38 |
| 2013 | 7.6 | 31 |
| 2012 | 9.5 | 17 |
| 2011 | 14 | 10 |
| 2010 | -15.91 | 171 |
| 2009 | 5.92 | 38 |
| 2008 | 3 | 93 |
| 2007 | 10.3 | 17 |
| 2006 | 0.48 | 117 |
| 2005 | 11.28 | 15 |
| 2004 | 14.54 | 17 |
| 2003 | 4.21 | 59 |
| 2002 | 3.87 | 61 |
| 2001 | 12.14 | 14 |
| 2000 | -1.1 | 112 |
| 1999 | 1.4 | 106 |
| 1998 | 12.86 | 11 |
| 1997 | -4.5 | 134 |
| 1996 | 1.99 | 97 |
| 1995 | 4 | 57 |
| 1994 | 3.1 | 52 |
| 1993 | -5.8 | 108 |
| 1992 | -8.7 | 112 |
| 1991 | -2 | 94 |