| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 93.57 | 20 |
| 2015 | 93.6 | 19 |
| 2014 | 93.64 | 17 |
| 2013 | 93.68 | 17 |
| 2012 | 93.72 | 17 |
| 2011 | 93.77 | 16 |
| 2010 | 93.83 | 16 |
| 2009 | 93.88 | 16 |
| 2008 | 93.94 | 15 |
| 2007 | 94 | 14 |
| 2006 | 94.06 | 11 |
| 2005 | 94.11 | 11 |
| 2004 | 94.17 | 11 |
| 2003 | 94.22 | 11 |
| 2002 | 94.28 | 11 |
| 2001 | 94.33 | 11 |
| 2000 | 94.39 | 11 |
| 1999 | 94.3 | 11 |
| 1998 | 94.16 | 11 |
| 1997 | 94.02 | 11 |
| 1996 | 93.88 | 11 |
| 1995 | 93.73 | 11 |
| 1994 | 93.58 | 12 |
| 1993 | 93.42 | 12 |
| 1992 | 93.27 | 12 |
| 1991 | 93.11 | 12 |
| 1990 | 92.94 | 11 |
| 1989 | 91.92 | 12 |
| 1988 | 90.41 | 13 |
| 1987 | 88.66 | 17 |
| 1986 | 86.64 | 19 |