| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.23 | 84 |
| 2015 | 1.33 | 83 |
| 2014 | 1.43 | 80 |
| 2013 | 1.39 | 81 |
| 2012 | 1.32 | 86 |
| 2011 | 1.29 | 85 |
| 2010 | 1.38 | 83 |
| 2009 | 1.52 | 78 |
| 2008 | 1.4 | 90 |
| 2007 | 1.59 | 73 |
| 2006 | 1.24 | 106 |
| 2005 | 1.35 | 103 |
| 2004 | 1.36 | 103 |
| 2003 | 1.21 | 112 |
| 2002 | 1.32 | 101 |
| 2001 | 1.31 | 99 |
| 2000 | 1.39 | 92 |
| 1999 | 1.38 | 92 |
| 1998 | 1.41 | 91 |
| 1997 | 1.57 | 86 |
| 1996 | 1.44 | 93 |
| 1995 | 1.55 | 91 |
| 1994 | 1.6 | 97 |
| 1993 | 1.89 | 84 |
| 1992 | 2.12 | 69 |
| 1991 | 2.22 | 67 |
| 1990 | 2.72 | 55 |
| 1989 | 2.55 | 54 |
| 1988 | 2.19 | 73 |
| 1987 | 2.14 | 70 |
| 1986 | 2.51 | 55 |