| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2 | 111 |
| 2015 | 2.39 | 115 |
| 2014 | 3.1 | 101 |
| 2013 | 2.83 | 105 |
| 2012 | 2.65 | 112 |
| 2011 | 2.59 | 125 |
| 2010 | 2.31 | 136 |
| 2009 | 5.48 | 26 |
| 2008 | 7.23 | 37 |
| 2007 | 8.18 | 51 |
| 2006 | 8.09 | 44 |
| 2005 | 8.15 | 35 |
| 2004 | 8.57 | 32 |
| 2003 | 4.16 | 99 |
| 2002 | 5.78 | 40 |
| 2001 | 5.27 | 45 |
| 2000 | 4.25 | 96 |
| 1999 | 3.41 | 93 |
| 1998 | 2.99 | 124 |
| 1997 | 3.31 | 123 |
| 1996 | 2.09 | 143 |
| 1995 | 6.19 | 51 |
| 1994 | 4.99 | 64 |
| 1993 | 4.63 | 59 |
| 1992 | 18.66 | 3 |
| 1991 | 1.82 | 94 |
| 1990 | 0.97 | 112 |
| 1989 | -13.45 | 164 |
| 1988 | -1.85 | 149 |
| 1987 | 2.9 | 92 |
| 1986 | 7.01 | 31 |