| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 104.64 | 20 |
| 2015 | 108.8 | 19 |
| 2014 | 112.78 | 18 |
| 2013 | 114.57 | 19 |
| 2012 | 110.19 | 26 |
| 2011 | 105.87 | 29 |
| 2010 | 91.17 | 37 |
| 2009 | 76.97 | 48 |
| 2008 | 108.42 | 30 |
| 2007 | 108.3 | 25 |
| 2006 | 111.75 | 24 |
| 2005 | 100.27 | 33 |
| 2004 | 93.45 | 40 |
| 2003 | 87.38 | 41 |
| 2002 | 83.66 | 41 |
| 2001 | 87.7 | 39 |
| 2000 | 86.67 | 42 |
| 1999 | 70.08 | 60 |
| 1998 | 63.22 | 69 |
| 1997 | 88.16 | 30 |
| 1996 | 98.57 | 22 |
| 1995 | 84.32 | 30 |
| 1994 | 88.58 | 22 |
| 1993 | 78.3 | 27 |
| 1992 | 75.07 | 40 |
| 1991 | 68.99 | 38 |
| 1990 | 49.1 | 79 |
| 1989 | 142.8 | 6 |
| 1988 | 150.69 | 3 |
| 1987 | 113.91 | 9 |
| 1986 | 144.89 | 4 |