| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2014 | 4.21 | 58 |
| 2013 | 4.78 | 54 |
| 2012 | 2.22 | 95 |
| 2011 | 6.07 | 51 |
| 2010 | 4.82 | 54 |
| 2009 | 0.66 | 105 |
| 2008 | 2.56 | 104 |
| 2007 | 3.51 | 75 |
| 2006 | 1.45 | 109 |
| 2005 | 2.32 | 81 |
| 2004 | 4.57 | 69 |
| 2003 | 3.74 | 63 |
| 2002 | 1.47 | 96 |
| 2001 | -.3 | 109 |
| 2000 | 4.68 | 55 |
| 1999 | -4.53 | 140 |
| 1998 | 8.58 | 23 |
| 1997 | 4.65 | 39 |
| 1996 | 4.83 | 52 |
| 1995 | 3.81 | 58 |
| 1994 | 1.26 | 69 |
| 1993 | 7.65 | 26 |
| 1992 | -4.48 | 102 |
| 1991 | -8.72 | 113 |
| 1990 | 17.74 | 7 |
| 1989 | 3.63 | 53 |
| 1988 | -3.99 | 97 |
| 1987 | -8.95 | 99 |
| 1986 | -3.68 | 96 |