| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -.61 | 111 |
| 2015 | -.99 | 161 |
| 2014 | 0.11 | 148 |
| 2013 | 1.03 | 146 |
| 2012 | 3.56 | 98 |
| 2011 | 4.26 | 107 |
| 2010 | 2.71 | 110 |
| 2009 | 3.83 | 75 |
| 2008 | 4.35 | 147 |
| 2007 | 2.39 | 135 |
| 2006 | 1.11 | 168 |
| 2005 | 2.11 | 137 |
| 2004 | 3.58 | 91 |
| 2003 | 0.79 | 147 |
| 2002 | 1.9 | 122 |
| 2001 | 5.49 | 62 |
| 2000 | 10.06 | 33 |
| 1999 | 7.28 | 46 |
| 1998 | 11.73 | 36 |
| 1997 | 15.08 | 33 |
| 1996 | 19.82 | 39 |
| 1995 | 28.07 | 36 |
| 1994 | 33.25 | 40 |
| 1993 | 36.87 | 29 |
| 1992 | 45.33 | 20 |
| 1991 | 76.71 | 14 |
| 1990 | 555.38 | 5 |
| 1989 | 244.55 | 5 |
| 1988 | 58.72 | 12 |
| 1987 | 26.38 | 19 |
| 1986 | 16.55 | 35 |