| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 5.063 | 108 |
| 2015 | 5.158 | 118 |
| 2014 | 4.968 | 130 |
| 2013 | 5.332 | 130 |
| 2012 | 4.703 | 145 |
| 2011 | 4.746 | 143 |
| 2010 | 4.6 | 147 |
| 2009 | 4.471 | 147 |
| 2008 | 5.888 | 134 |
| 2007 | 6.238 | 144 |
| 2006 | 5.654 | 141 |
| 2005 | 5.508 | 140 |
| 2004 | 5.324 | 142 |
| 2003 | 5.85 | 133 |
| 2002 | 6.038 | 137 |
| 2001 | 6.898 | 134 |
| 2000 | 7.276 | 131 |
| 1999 | 7.699 | 128 |
| 1998 | 8.085 | 124 |
| 1997 | 7.992 | 123 |
| 1996 | 7.767 | 124 |
| 1995 | 7.378 | 125 |
| 1994 | 8.5 | 112 |
| 1993 | 8.5 | 108 |
| 1992 | 8.5 | 99 |
| 1991 | 8.5 | 99 |
| 1990 | 8.5 | 96 |
| 1989 | 8.5 | 96 |
| 1988 | 8.458 | 91 |
| 1987 | 8 | 94 |
| 1986 | 8 | 93 |