| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 76 | 19 |
| 2015 | 76.34 | 17 |
| 2014 | 76.56 | 17 |
| 2013 | 76.54 | 16 |
| 2012 | 76.34 | 15 |
| 2011 | 76.29 | 17 |
| 2010 | 76.4 | 17 |
| 2009 | 76.21 | 17 |
| 2008 | 75.96 | 17 |
| 2007 | 75.93 | 17 |
| 2006 | 76.1 | 17 |
| 2005 | 75.98 | 16 |
| 2004 | 75.61 | 16 |
| 2003 | 75.87 | 15 |
| 2002 | 75.82 | 15 |
| 2001 | 75.32 | 15 |
| 2000 | 75.01 | 16 |
| 1999 | 76.6 | 11 |
| 1998 | 76.69 | 11 |
| 1997 | 75.17 | 16 |
| 1996 | 76.43 | 14 |
| 1995 | 77.11 | 12 |
| 1994 | 77.17 | 12 |
| 1993 | 77.25 | 13 |
| 1992 | 76.97 | 14 |
| 1991 | 77.26 | 15 |