| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.77 | 58 |
| 2015 | 1.43 | 91 |
| 2014 | 4.1 | 64 |
| 2013 | 3 | 83 |
| 2012 | 3.17 | 107 |
| 2011 | 4.65 | 98 |
| 2010 | 3.79 | 84 |
| 2009 | 4.22 | 70 |
| 2008 | 8.26 | 101 |
| 2007 | 2.9 | 123 |
| 2006 | 5.49 | 78 |
| 2005 | 6.52 | 67 |
| 2004 | 4.83 | 64 |
| 2003 | 2.29 | 103 |
| 2002 | 2.72 | 96 |
| 2001 | 5.35 | 64 |
| 2000 | 3.98 | 76 |
| 1999 | 5.94 | 57 |
| 1998 | 9.23 | 49 |
| 1997 | 5.59 | 82 |
| 1996 | 7.48 | 75 |
| 1995 | 6.83 | 100 |
| 1994 | 10.39 | 78 |
| 1993 | 6.72 | 78 |
| 1992 | 8.65 | 70 |
| 1991 | 19.26 | 43 |
| 1990 | 12.18 | 51 |
| 1989 | 12.24 | 48 |
| 1988 | 13.86 | 42 |
| 1987 | 4.07 | 81 |
| 1986 | 1.15 | 103 |