| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 75.29 | 49 |
| 2015 | 75.37 | 49 |
| 2014 | 75.43 | 47 |
| 2013 | 75.24 | 49 |
| 2012 | 74.98 | 52 |
| 2011 | 74.28 | 53 |
| 2010 | 73.4 | 56 |
| 2009 | 73.23 | 58 |
| 2008 | 73.64 | 60 |
| 2007 | 74.15 | 58 |
| 2006 | 74.77 | 53 |
| 2005 | 75.26 | 49 |
| 2004 | 75.8 | 41 |
| 2003 | 76.32 | 42 |
| 2002 | 77.04 | 40 |
| 2001 | 77.71 | 39 |
| 2000 | 78.62 | 37 |
| 1999 | 77.96 | 39 |
| 1998 | 78.62 | 39 |
| 1997 | 79.26 | 36 |
| 1996 | 79.12 | 35 |
| 1995 | 78.6 | 39 |
| 1994 | 78.03 | 42 |
| 1993 | 77.69 | 48 |
| 1992 | 77.88 | 49 |
| 1991 | 77.97 | 48 |