| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 80.88 | 15 |
| 2015 | 80.87 | 15 |
| 2014 | 80.84 | 14 |
| 2013 | 80.82 | 15 |
| 2012 | 80.77 | 15 |
| 2011 | 80.73 | 16 |
| 2010 | 80.67 | 17 |
| 2009 | 80.6 | 16 |
| 2008 | 80.52 | 16 |
| 2007 | 80.44 | 16 |
| 2006 | 80.37 | 16 |
| 2005 | 80.1 | 15 |
| 2004 | 79.81 | 15 |
| 2003 | 79.52 | 16 |
| 2002 | 79.23 | 18 |
| 2001 | 78.93 | 17 |
| 2000 | 78.62 | 16 |
| 1999 | 78.3 | 16 |
| 1998 | 77.97 | 18 |
| 1997 | 77.64 | 21 |
| 1996 | 77.29 | 22 |
| 1995 | 76.94 | 23 |
| 1994 | 76.62 | 23 |
| 1993 | 76.29 | 24 |
| 1992 | 75.94 | 25 |
| 1991 | 75.57 | 25 |
| 1990 | 75.18 | 28 |