| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 93.73 | 1 |
| 2015 | 94.15 | 1 |
| 2014 | 93.91 | 1 |
| 2013 | 93.94 | 1 |
| 2012 | 93.76 | 1 |
| 2011 | 94.57 | 1 |
| 2010 | 95.58 | 1 |
| 2009 | 94.56 | 1 |
| 2008 | 93.35 | 1 |
| 2007 | 92.39 | 1 |
| 2006 | 91.76 | 1 |
| 2005 | 93.19 | 1 |
| 2004 | 92.01 | 1 |
| 2003 | 91.55 | 1 |
| 2002 | 90.62 | 1 |
| 2001 | 90.25 | 1 |
| 2000 | 91.24 | 1 |
| 1999 | 92.34 | 1 |
| 1998 | 92.85 | 1 |
| 1997 | 92.94 | 1 |
| 1996 | 94.7 | 1 |
| 1995 | 94.99 | 1 |
| 1994 | 94.4 | 1 |
| 1993 | 93.82 | 1 |
| 1992 | 93.41 | 1 |
| 1991 | 93.54 | 1 |