| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.121 | 79 |
| 2015 | 2.135 | 91 |
| 2014 | 2.159 | 106 |
| 2013 | 2.116 | 111 |
| 2012 | 2.143 | 120 |
| 2011 | 2.319 | 113 |
| 2010 | 3.043 | 104 |
| 2009 | 3.489 | 94 |
| 2008 | 3.531 | 121 |
| 2007 | 4.757 | 89 |
| 2006 | 3.831 | 105 |
| 2005 | 2.695 | 120 |
| 2004 | 2.234 | 122 |
| 2003 | 3.976 | 91 |
| 2002 | 4.965 | 80 |
| 2001 | 6.828 | 61 |
| 2000 | 7.069 | 75 |
| 1999 | 6.922 | 83 |
| 1998 | 6.763 | 91 |
| 1997 | 7.032 | 83 |
| 1996 | 7.198 | 83 |
| 1995 | 7.175 | 84 |
| 1994 | 6.113 | 88 |
| 1993 | 5.898 | 88 |
| 1992 | 5.673 | 92 |
| 1991 | 7.728 | 65 |
| 1990 | 8.4 | 62 |
| 1989 | 8.493 | 62 |
| 1988 | 7.54 | 61 |
| 1987 | 6.593 | 65 |
| 1986 | 6.503 | 74 |