| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -1.56 | 125 |
| 2015 | -2.4 | 170 |
| 2014 | -.22 | 158 |
| 2013 | 1.63 | 124 |
| 2012 | 3.92 | 88 |
| 2011 | 3.28 | 136 |
| 2010 | 3.03 | 100 |
| 2007 | 24411.03 | 1 |
| 2006 | 1096.68 | 1 |
| 2005 | 302.12 | 1 |
| 2004 | 282.38 | 1 |
| 2003 | 431.7 | 1 |
| 2002 | 140.06 | 1 |
| 2001 | 76.71 | 4 |
| 2000 | 55.87 | 7 |
| 1999 | 58.52 | 8 |
| 1998 | 31.82 | 12 |
| 1997 | 18.74 | 26 |
| 1996 | 21.43 | 35 |
| 1995 | 22.59 | 44 |
| 1994 | 22.26 | 58 |
| 1993 | 27.59 | 34 |
| 1992 | 42.06 | 23 |
| 1991 | 23.34 | 35 |
| 1990 | 17.36 | 39 |
| 1989 | 12.88 | 44 |
| 1988 | 7.42 | 64 |
| 1987 | 12.47 | 41 |
| 1986 | 14.33 | 38 |