| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.79 | 85 |
| 2015 | 1.58 | 96 |
| 2014 | 3.17 | 59 |
| 2013 | 1.61 | 105 |
| 2012 | -2.72 | 178 |
| 2011 | 0.29 | 155 |
| 2010 | 2.97 | 93 |
| 2009 | -6.11 | 175 |
| 2008 | -3.03 | 184 |
| 2007 | 6.69 | 47 |
| 2006 | 3.51 | 107 |
| 2005 | 1.61 | 146 |
| 2004 | 2.15 | 138 |
| 2003 | 0.4 | 148 |
| 2002 | 2.74 | 70 |
| 2001 | 1.32 | 107 |
| 2000 | 6.79 | 23 |
| 1999 | 7.03 | 18 |
| 1998 | 4.73 | 39 |
| 1997 | 4.39 | 56 |
| 1996 | 0.02 | 156 |
| 1995 | 0.02 | 141 |
| 1994 | 2.42 | 77 |
| 1993 | 2.81 | 58 |
| 1992 | 0.48 | 88 |
| 1991 | 7.2 | 11 |
| 1990 | 4.01 | 40 |
| 1989 | 8.74 | 9 |
| 1988 | 7.68 | 22 |
| 1987 | 3.28 | 50 |
| 1986 | 9.49 | 9 |