| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 30 | 48 |
| 2015 | 28.57 | 66 |
| 2014 | 36.51 | 32 |
| 2013 | 45.21 | 16 |
| 2012 | 44.01 | 18 |
| 2011 | 48.39 | 15 |
| 2010 | 41.63 | 22 |
| 2009 | 35.34 | 35 |
| 2008 | 39.45 | 32 |
| 2007 | 39.6 | 30 |
| 2006 | 46.53 | 17 |
| 2005 | 33.19 | 50 |
| 2004 | 27.31 | 86 |
| 2003 | 24.25 | 108 |
| 2002 | 26.27 | 95 |
| 2001 | 28.31 | 81 |
| 2000 | 27.98 | 81 |
| 1999 | 29.54 | 69 |
| 1998 | 31.61 | 50 |
| 1997 | 26.44 | 94 |
| 1996 | 25.4 | 101 |
| 1995 | 25.18 | 102 |
| 1994 | 24.72 | 90 |
| 1993 | 24.61 | 92 |
| 1992 | 23.4 | 92 |
| 1991 | 24.15 | 91 |
| 1990 | 28.81 | 71 |
| 1989 | 29.69 | 55 |
| 1988 | 27.23 | 65 |
| 1987 | 26.75 | 64 |
| 1986 | 31.14 | 46 |