| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.648 | 63 |
| 2015 | 2.289 | 88 |
| 2014 | 2.312 | 104 |
| 2013 | 2.325 | 107 |
| 2012 | 2.457 | 116 |
| 2011 | 2.328 | 112 |
| 2010 | 1.543 | 134 |
| 2009 | 2.828 | 117 |
| 2008 | 3.506 | 122 |
| 2007 | 3.23 | 132 |
| 2006 | 3.205 | 116 |
| 2005 | 2.589 | 122 |
| 2004 | 2.418 | 116 |
| 2003 | 3.121 | 105 |
| 2002 | 3.54 | 107 |
| 2001 | 7.548 | 58 |
| 2000 | 9.795 | 44 |
| 1999 | 11.804 | 40 |
| 1998 | 10.898 | 52 |
| 1997 | 10.347 | 57 |
| 1996 | 10.2 | 65 |
| 1995 | 9.633 | 63 |
| 1994 | 9.9 | 53 |
| 1993 | 15.458 | 35 |
| 1992 | 59.65 | 7 |
| 1991 | 170.544 | 4 |
| 1990 | 2439.563 | 2 |
| 1989 | 1135.595 | 4 |
| 1988 | 161.784 | 5 |