| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 83.78 | 22 |
| 2015 | 83.59 | 25 |
| 2014 | 83.42 | 25 |
| 2013 | 83.47 | 23 |
| 2012 | 88.21 | 9 |
| 2011 | 84.87 | 16 |
| 2010 | 85.69 | 15 |
| 2009 | 86.51 | 14 |
| 2008 | 87.29 | 13 |
| 2007 | 88.03 | 12 |
| 2006 | 88.73 | 11 |
| 2005 | 87.61 | 13 |
| 2004 | 86.13 | 13 |
| 2003 | 86.42 | 13 |
| 2002 | 86.67 | 12 |
| 2001 | 86.93 | 13 |
| 2000 | 87.18 | 13 |
| 1999 | 87.5 | 13 |
| 1998 | 87.82 | 13 |
| 1997 | 88.16 | 13 |
| 1996 | 88.47 | 13 |
| 1995 | 88.75 | 12 |
| 1994 | 89.08 | 12 |
| 1993 | 89.39 | 12 |
| 1992 | 89.67 | 12 |
| 1991 | 89.94 | 13 |
| 1990 | 90.2 | 13 |