| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.167 | 106 |
| 2015 | 1.115 | 121 |
| 2014 | 1.073 | 133 |
| 2013 | 1.134 | 135 |
| 2012 | 1.523 | 132 |
| 2011 | 1.941 | 126 |
| 2010 | 2.268 | 119 |
| 2009 | 2.324 | 124 |
| 2008 | 2.374 | 143 |
| 2007 | 2.473 | 149 |
| 2006 | 2.536 | 138 |
| 2005 | 2.589 | 123 |
| 2004 | 2.683 | 108 |
| 2003 | 3.183 | 103 |
| 2002 | 4.527 | 90 |
| 2001 | 7.632 | 57 |
| 2000 | 8.708 | 56 |
| 1999 | 9.075 | 57 |
| 1998 | 8.1 | 76 |
| 1997 | 8.564 | 70 |
| 1996 | 10.488 | 63 |
| 1995 | 12.9 | 48 |
| 1994 | 11.418 | 46 |
| 1993 | 12.258 | 42 |
| 1992 | 22.509 | 22 |
| 1991 | 29.529 | 17 |
| 1990 | 29.175 | 15 |
| 1989 | 15.808 | 29 |
| 1988 | 12 | 34 |
| 1987 | 11.083 | 31 |
| 1986 | 12 | 27 |