| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 113.4 | 6 |
| 2015 | 133.3 | 5 |
| 2014 | 91 | 7 |
| 2013 | 101.9 | 5 |
| 2012 | 129.6 | 3 |
| 2011 | 160.9 | 3 |
| 2010 | 148.9 | 4 |
| 2009 | 186.9 | 3 |
| 2008 | 118.5 | 7 |
| 2007 | 170.8 | 7 |
| 2006 | 132.4 | 4 |
| 2005 | 133.6 | 5 |
| 2004 | 68.7 | 15 |
| 2003 | 67.2 | 12 |
| 2002 | 95.4 | 6 |
| 2001 | 70.2 | 11 |
| 2000 | 88.2 | 12 |
| 1999 | 157.6 | 4 |
| 1998 | 42.9 | 13 |
| 1997 | 30.6 | 15 |
| 1996 | 29.7 | 13 |
| 1995 | 33.1 | 9 |
| 1994 | 63 | 4 |
| 1993 | 54.5 | 5 |
| 1992 | 32.9 | 5 |
| 1991 | 25.3 | 7 |
| 1990 | 26.7 | 9 |
| 1989 | 49.1 | 4 |
| 1988 | 43.1 | 3 |
| 1987 | 17.7 | 12 |
| 1986 | 9.6 | 13 |