| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 84.6 | 18 |
| 2015 | 84.58 | 17 |
| 2014 | 84.57 | 16 |
| 2013 | 84.71 | 16 |
| 2012 | 84.95 | 16 |
| 2011 | 85.1 | 15 |
| 2010 | 85.23 | 17 |
| 2009 | 85.36 | 18 |
| 2008 | 85.47 | 16 |
| 2007 | 85.57 | 15 |
| 2006 | 85.66 | 16 |
| 2005 | 85.74 | 16 |
| 2004 | 85.85 | 15 |
| 2003 | 85.93 | 14 |
| 2002 | 86.03 | 14 |
| 2001 | 86.11 | 14 |
| 2000 | 86.19 | 16 |
| 1999 | 86.27 | 16 |
| 1998 | 86.36 | 17 |
| 1997 | 86.46 | 17 |
| 1996 | 86.58 | 18 |
| 1995 | 86.71 | 20 |
| 1994 | 86.81 | 19 |
| 1993 | 86.92 | 20 |
| 1992 | 87.04 | 20 |
| 1991 | 87.15 | 20 |
| 1990 | 87.2 | 22 |