| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 4.98 | 35 |
| 2015 | 0.27 | 114 |
| 2014 | 4.54 | 44 |
| 2013 | -1.35 | 134 |
| 2012 | -2.78 | 145 |
| 2011 | -1.27 | 129 |
| 2010 | -4.02 | 145 |
| 2009 | -2.51 | 145 |
| 2008 | 1.3 | 120 |
| 2007 | 6.87 | 49 |
| 2006 | 5.12 | 66 |
| 2005 | 4.56 | 56 |
| 2004 | 1.72 | 94 |
| 2003 | 2.95 | 74 |
| 2002 | 6.85 | 36 |
| 2001 | 10.17 | 18 |
| 2000 | 8.41 | 22 |
| 1999 | 5.63 | 36 |
| 1998 | 7.4 | 26 |
| 1997 | 6.74 | 32 |
| 1996 | 3.5 | 53 |
| 1995 | 3.87 | 39 |
| 1994 | 4.12 | 32 |
| 1993 | 0.08 | 80 |
| 1992 | 2.97 | 48 |
| 1991 | 2.68 | 61 |
| 1990 | 5.42 | 26 |
| 1989 | -1.27 | 81 |
| 1988 | -4.98 | 85 |
| 1987 | -4.85 | 86 |
| 1986 | 2.62 | 49 |