| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 75.55 | 16 |
| 2015 | 75.53 | 15 |
| 2014 | 75.52 | 15 |
| 2013 | 75.63 | 15 |
| 2012 | 77.5 | 12 |
| 2011 | 82.27 | 6 |
| 2010 | 81.6 | 7 |
| 2009 | 78.01 | 12 |
| 2008 | 73.63 | 17 |
| 2007 | 76.3 | 15 |
| 2006 | 76.13 | 15 |
| 2005 | 75.92 | 15 |
| 2004 | 75.71 | 15 |
| 2003 | 78.03 | 11 |
| 2002 | 79.9 | 8 |
| 2001 | 81.44 | 6 |
| 2000 | 78.4 | 9 |
| 1999 | 77.67 | 9 |
| 1998 | 75.31 | 12 |
| 1997 | 76.24 | 11 |
| 1996 | 77.08 | 9 |
| 1995 | 77.21 | 9 |
| 1994 | 77.31 | 9 |
| 1993 | 77.34 | 10 |
| 1992 | 77.21 | 10 |
| 1991 | 77.13 | 11 |
| 1990 | 77.11 | 11 |