| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 48.53 | 85 |
| 2015 | 48.36 | 85 |
| 2014 | 47.77 | 88 |
| 2013 | 47.44 | 90 |
| 2012 | 46.97 | 91 |
| 2011 | 47.33 | 89 |
| 2010 | 48.09 | 84 |
| 2009 | 49.42 | 78 |
| 2008 | 51.54 | 70 |
| 2007 | 52.04 | 66 |
| 2006 | 51.02 | 68 |
| 2005 | 50.32 | 68 |
| 2004 | 48.15 | 78 |
| 2003 | 47.69 | 78 |
| 2002 | 47.35 | 81 |
| 2001 | 46.34 | 88 |
| 2000 | 45.62 | 91 |
| 1999 | 43.95 | 98 |
| 1998 | 41.33 | 108 |
| 1997 | 38.19 | 121 |
| 1996 | 36.63 | 126 |
| 1995 | 35.14 | 129 |
| 1994 | 33.57 | 136 |
| 1993 | 32.21 | 140 |
| 1992 | 31.06 | 145 |
| 1991 | 30.47 | 147 |