| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 74.44 | 91 |
| 2015 | 74.47 | 91 |
| 2014 | 74.44 | 91 |
| 2013 | 74.34 | 92 |
| 2012 | 74.63 | 92 |
| 2011 | 74.21 | 94 |
| 2010 | 74.89 | 91 |
| 2009 | 74.55 | 91 |
| 2008 | 74.62 | 93 |
| 2007 | 75.61 | 84 |
| 2006 | 76.63 | 75 |
| 2005 | 76.56 | 76 |
| 2004 | 76.38 | 78 |
| 2003 | 73.24 | 103 |
| 2002 | 73.61 | 105 |
| 2001 | 73.96 | 102 |
| 2000 | 74.32 | 98 |
| 1999 | 74.64 | 98 |
| 1998 | 74.96 | 98 |
| 1997 | 75.31 | 100 |
| 1996 | 75.7 | 97 |
| 1995 | 76.16 | 95 |
| 1994 | 76.25 | 97 |
| 1993 | 76.37 | 96 |
| 1992 | 76.53 | 95 |
| 1991 | 76.64 | 96 |
| 1990 | 76.68 | 101 |