| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 59.408 | 92 |
| 2014 | 57.708 | 99 |
| 2013 | 55.495 | 108 |
| 2012 | 53.759 | 111 |
| 2011 | 51.858 | 117 |
| 2010 | 53.465 | 113 |
| 2009 | 55.334 | 109 |
| 2008 | 52.654 | 114 |
| 2007 | 51.581 | 116 |
| 2006 | 51.834 | 113 |
| 2005 | 54.737 | 105 |
| 2004 | 56.487 | 94 |
| 2003 | 59.191 | 85 |
| 2002 | 59.58 | 83 |
| 2001 | 59.616 | 81 |
| 2000 | 59.286 | 79 |
| 1999 | 59.43 | 67 |
| 1998 | 59.221 | 69 |
| 1997 | 58.639 | 69 |
| 1996 | 58.682 | 63 |
| 1995 | 58.761 | 61 |
| 1994 | 58.378 | 45 |
| 1993 | 60.36 | 41 |
| 1992 | 62.507 | 37 |
| 1991 | 63.38 | 32 |