| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 76.1 | 44 |
| 2015 | 75.79 | 45 |
| 2014 | 75.53 | 45 |
| 2013 | 75.5 | 46 |
| 2012 | 75.55 | 45 |
| 2011 | 75.62 | 42 |
| 2010 | 75.75 | 39 |
| 2009 | 76.02 | 37 |
| 2008 | 76.3 | 40 |
| 2007 | 76.67 | 41 |
| 2006 | 77.04 | 39 |
| 2005 | 77.51 | 36 |
| 2004 | 77.07 | 36 |
| 2003 | 77.8 | 31 |
| 2002 | 78.46 | 32 |
| 2001 | 78.79 | 33 |
| 2000 | 79.06 | 33 |
| 1999 | 79.33 | 33 |
| 1998 | 79.64 | 32 |
| 1997 | 79.71 | 33 |
| 1996 | 80 | 32 |
| 1995 | 79.61 | 35 |
| 1994 | 79.88 | 33 |
| 1993 | 80.21 | 30 |
| 1992 | 80.4 | 31 |
| 1991 | 80.78 | 29 |