| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2014 | 2.5 | 99 |
| 2013 | 2.5 | 103 |
| 2012 | 2.5 | 113 |
| 2011 | 2.5 | 110 |
| 2010 | 2.5 | 115 |
| 2009 | 2.5 | 122 |
| 2008 | 2.5 | 139 |
| 2007 | 2.5 | 147 |
| 2006 | 2.5 | 141 |
| 2005 | 2.125 | 134 |
| 2004 | 2.083 | 124 |
| 2003 | 3 | 111 |
| 2002 | 3 | 115 |
| 2001 | 3 | 126 |
| 2000 | 3 | 132 |
| 1999 | 3.208 | 131 |
| 1993 | 5.5 | 91 |
| 1992 | 5.5 | 95 |
| 1991 | 5.5 | 95 |
| 1990 | 5.5 | 98 |
| 1989 | 5.5 | 93 |
| 1988 | 5.5 | 84 |
| 1987 | 5.5 | 83 |
| 1986 | 5.5 | 91 |