| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 0.5 | 87 |
| 2015 | 0.95 | 106 |
| 2014 | 2.12 | 95 |
| 2013 | 3.81 | 77 |
| 2012 | 10.88 | 19 |
| 2011 | 12.85 | 20 |
| 2010 | 6.61 | 44 |
| 2009 | 3.98 | 73 |
| 2008 | 12.26 | 50 |
| 2007 | 7.37 | 59 |
| 2006 | 2.08 | 147 |
| 2005 | 1.3 | 159 |
| 2004 | -1.69 | 167 |
| 2003 | -1.26 | 166 |
| 2002 | 4.18 | 69 |
| 2001 | 0.67 | 154 |
| 2000 | -1.17 | 160 |
| 1999 | 2.95 | 86 |
| 1998 | -1.4 | 162 |
| 1997 | 7.57 | 65 |
| 1996 | 6.24 | 88 |
| 1995 | 5.49 | 109 |
| 1994 | 3.39 | 117 |
| 1993 | 20.13 | 45 |
| 1992 | 16.85 | 40 |
| 1991 | 14.73 | 52 |
| 1990 | 3.62 | 104 |
| 1989 | -23.82 | 135 |