| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 69.03 | 31 |
| 2015 | 69.81 | 30 |
| 2014 | 69.9 | 30 |
| 2013 | 69.66 | 30 |
| 2012 | 69.6 | 28 |
| 2011 | 69.5 | 29 |
| 2010 | 68.99 | 29 |
| 2009 | 68.27 | 33 |
| 2008 | 68.51 | 33 |
| 2007 | 67.69 | 33 |
| 2006 | 65.16 | 44 |
| 2005 | 63.4 | 51 |
| 2004 | 61.59 | 56 |
| 2003 | 59.55 | 68 |
| 2002 | 60.47 | 62 |
| 2001 | 62.17 | 56 |
| 2000 | 60.66 | 64 |
| 1999 | 61.56 | 56 |
| 1998 | 63.39 | 48 |
| 1997 | 64.67 | 38 |
| 1996 | 64.72 | 40 |
| 1995 | 57.7 | 84 |
| 1994 | 56.81 | 93 |
| 1993 | 57.1 | 88 |
| 1992 | 56.89 | 89 |
| 1991 | 55.8 | 100 |