| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 63.3 | 11 |
| 2015 | 66.7 | 12 |
| 2014 | 65.1 | 14 |
| 2013 | 92.1 | 6 |
| 2012 | 90.2 | 5 |
| 2011 | 99.7 | 6 |
| 2010 | 129.3 | 7 |
| 2009 | 131.9 | 6 |
| 2008 | 131.6 | 4 |
| 2007 | 211.8 | 4 |
| 2006 | 125.8 | 6 |
| 2005 | 91.5 | 8 |
| 2004 | 97 | 5 |
| 2003 | 97.3 | 4 |
| 2002 | 68.6 | 10 |
| 2001 | 79.6 | 9 |
| 2000 | 99.3 | 9 |
| 1999 | 124.5 | 7 |
| 1998 | 68.3 | 6 |
| 1997 | 74 | 5 |
| 1996 | 62.5 | 4 |
| 1995 | 72.8 | 2 |
| 1994 | 120.5 | 1 |
| 1993 | 137.6 | 1 |
| 1992 | 36.2 | 4 |
| 1991 | 39.8 | 2 |
| 1990 | 58.3 | 2 |
| 1989 | 46.4 | 5 |
| 1988 | 18.2 | 9 |
| 1987 | 34.6 | 6 |
| 1986 | 14.4 | 9 |