| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 93.81 | 1 |
| 2015 | 94.21 | 1 |
| 2014 | 93.98 | 1 |
| 2013 | 94.03 | 1 |
| 2012 | 93.91 | 1 |
| 2011 | 94.73 | 1 |
| 2010 | 95.72 | 1 |
| 2009 | 94.69 | 1 |
| 2008 | 93.48 | 1 |
| 2007 | 92.6 | 1 |
| 2006 | 92.53 | 1 |
| 2005 | 94.08 | 1 |
| 2004 | 93.18 | 1 |
| 2003 | 92.56 | 2 |
| 2002 | 91.85 | 2 |
| 2001 | 91.65 | 2 |
| 2000 | 91.91 | 2 |
| 1999 | 92.4 | 2 |
| 1998 | 92.97 | 2 |
| 1997 | 93.78 | 1 |
| 1996 | 94.78 | 1 |
| 1995 | 95.08 | 1 |
| 1994 | 94.5 | 1 |
| 1993 | 93.94 | 1 |
| 1992 | 93.54 | 1 |
| 1991 | 93.75 | 1 |
| 1990 | 94.03 | 1 |