| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 88.9 | 26 |
| 2015 | 87.86 | 29 |
| 2014 | 88.39 | 23 |
| 2013 | 90.06 | 22 |
| 2012 | 91.42 | 21 |
| 2011 | 98.85 | 21 |
| 2010 | 99.47 | 20 |
| 2009 | 96.4 | 21 |
| 2008 | 87.11 | 29 |
| 2007 | 90.26 | 26 |
| 2006 | 87.37 | 27 |
| 2005 | 85.8 | 26 |
| 2004 | 106.23 | 17 |
| 2003 | 89.57 | 24 |
| 2002 | 92.34 | 20 |
| 2001 | 86.73 | 20 |
| 2000 | 78.17 | 22 |
| 1999 | 74.11 | 26 |
| 1998 | 70.38 | 26 |
| 1997 | 71.27 | 24 |
| 1996 | 69.22 | 26 |
| 1995 | 67.51 | 26 |
| 1994 | 64.31 | 25 |
| 1993 | 60.01 | 34 |
| 1992 | 48.64 | 46 |
| 1991 | 47.04 | 46 |
| 1990 | 48.28 | 44 |
| 1989 | 45.86 | 45 |
| 1988 | 48.62 | 41 |
| 1987 | 43.68 | 45 |
| 1986 | 44.81 | 39 |