| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 94.59 | 16 |
| 2015 | 94.52 | 16 |
| 2014 | 94.44 | 14 |
| 2013 | 94.36 | 14 |
| 2012 | 94.27 | 14 |
| 2011 | 94.19 | 14 |
| 2010 | 94.1 | 14 |
| 2009 | 94.01 | 15 |
| 2008 | 93.92 | 16 |
| 2007 | 93.82 | 15 |
| 2006 | 93.73 | 15 |
| 2005 | 93.63 | 15 |
| 2004 | 93.53 | 13 |
| 2003 | 93.44 | 13 |
| 2002 | 93.33 | 13 |
| 2001 | 93.23 | 13 |
| 2000 | 93.13 | 13 |
| 1999 | 92.95 | 13 |
| 1998 | 92.73 | 14 |
| 1997 | 92.51 | 13 |
| 1996 | 92.29 | 13 |
| 1995 | 92.06 | 13 |
| 1994 | 91.82 | 13 |
| 1993 | 91.57 | 13 |
| 1992 | 91.32 | 13 |
| 1991 | 91.06 | 13 |
| 1990 | 90.8 | 13 |
| 1989 | 91 | 13 |
| 1988 | 91.35 | 12 |
| 1987 | 91.7 | 11 |
| 1986 | 92.02 | 11 |