| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 95.53 | 13 |
| 2015 | 95.41 | 13 |
| 2014 | 95.28 | 11 |
| 2013 | 95.14 | 11 |
| 2012 | 94.99 | 11 |
| 2011 | 94.83 | 11 |
| 2010 | 94.67 | 11 |
| 2009 | 94.49 | 11 |
| 2008 | 94.3 | 11 |
| 2007 | 94.09 | 11 |
| 2006 | 93.88 | 13 |
| 2005 | 93.65 | 14 |
| 2004 | 93.41 | 15 |
| 2003 | 93.16 | 15 |
| 2002 | 92.91 | 15 |
| 2001 | 92.64 | 15 |
| 2000 | 92.37 | 17 |
| 1999 | 92.09 | 17 |
| 1998 | 91.79 | 17 |
| 1997 | 91.49 | 16 |
| 1996 | 91.18 | 16 |
| 1995 | 90.95 | 16 |
| 1994 | 90.84 | 16 |
| 1993 | 90.72 | 16 |
| 1992 | 90.61 | 15 |
| 1991 | 90.5 | 15 |
| 1990 | 90.38 | 16 |
| 1989 | 90.27 | 16 |
| 1988 | 90.15 | 17 |
| 1987 | 90.03 | 16 |
| 1986 | 89.91 | 14 |