| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.5 | 97 |
| 2015 | 1.5 | 109 |
| 2014 | 1.5 | 122 |
| 2013 | 1.5 | 129 |
| 2012 | 1.5 | 133 |
| 2011 | 1.5 | 136 |
| 2010 | 1.505 | 136 |
| 2009 | 3.418 | 98 |
| 2008 | 7.37 | 57 |
| 2007 | 5.9 | 71 |
| 2006 | 4.789 | 75 |
| 2005 | 2.198 | 131 |
| 2004 | 2.792 | 106 |
| 2003 | 2.914 | 113 |
| 2002 | 4.76 | 85 |
| 2001 | 7.663 | 56 |
| 2000 | 8.151 | 65 |
| 1999 | 8.51 | 63 |
| 1998 | 7.953 | 79 |
| 1997 | 6.909 | 86 |
| 1994 | 6.906 | 81 |
| 1993 | 7.063 | 79 |
| 1992 | 6.988 | 81 |
| 1991 | 5.793 | 92 |
| 1990 | 5.958 | 94 |
| 1989 | 6.276 | 84 |
| 1988 | 6.01 | 77 |
| 1987 | 6.033 | 73 |
| 1986 | 6.038 | 80 |