| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -.8 | 114 |
| 2015 | -.1 | 139 |
| 2014 | -1.42 | 172 |
| 2013 | 0.89 | 149 |
| 2012 | 2.95 | 112 |
| 2011 | 4.22 | 108 |
| 2010 | 2.44 | 114 |
| 2009 | 2.75 | 96 |
| 2008 | 12.35 | 49 |
| 2007 | 8.4 | 43 |
| 2006 | 7.26 | 54 |
| 2005 | 5.04 | 77 |
| 2004 | 6.35 | 58 |
| 2003 | 2.16 | 111 |
| 2002 | 5.81 | 53 |
| 2001 | 7.36 | 41 |
| 2000 | 10.32 | 32 |
| 1999 | 2.57 | 94 |
| 1998 | 18.67 | 21 |
| 1997 | 1058.37 | 1 |
| 1996 | 121.61 | 4 |
| 1995 | 62.05 | 18 |
| 1994 | 96.06 | 17 |
| 1993 | 72.88 | 19 |
| 1992 | 91.3 | 9 |
| 1991 | 338.45 | 5 |
| 1990 | 23.8 | 28 |
| 1989 | 6.39 | 76 |
| 1988 | 2.37 | 103 |
| 1987 | 2.73 | 94 |
| 1986 | 2.7 | 87 |