| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.44 | 63 |
| 2015 | 1.21 | 86 |
| 2014 | 1.17 | 92 |
| 2013 | -.17 | 122 |
| 2012 | 0.82 | 103 |
| 2011 | 2.38 | 78 |
| 2010 | 0.7 | 110 |
| 2009 | -1.74 | 102 |
| 2008 | 2.65 | 70 |
| 2007 | 4.12 | 64 |
| 2006 | 1.64 | 100 |
| 2005 | 3.14 | 78 |
| 2004 | 3.93 | 66 |
| 2003 | 3 | 65 |
| 2002 | 1.84 | 76 |
| 2001 | 1.9 | 66 |
| 2000 | 2.9 | 56 |
| 1999 | 4.26 | 37 |
| 1998 | 3.8 | 50 |
| 1997 | 1.8 | 76 |
| 1996 | 1.94 | 82 |
| 1995 | 3.35 | 44 |
| 1994 | 1.33 | 63 |
| 1993 | 0.94 | 61 |
| 1992 | 1.14 | 55 |
| 1991 | -.21 | 67 |
| 1990 | 2.64 | 33 |
| 1989 | 2.99 | 35 |
| 1988 | 1.66 | 53 |
| 1987 | 0.62 | 56 |
| 1986 | 3.6 | 31 |