| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 41.51 | 68 |
| 2015 | 42.48 | 62 |
| 2014 | 43.41 | 58 |
| 2013 | 45.04 | 52 |
| 2012 | 45.33 | 54 |
| 2011 | 46.01 | 50 |
| 2010 | 44.4 | 55 |
| 2009 | 43.28 | 62 |
| 2008 | 43.66 | 70 |
| 2007 | 41.15 | 81 |
| 2006 | 38.34 | 95 |
| 2005 | 37.26 | 101 |
| 2004 | 33.99 | 119 |
| 2003 | 33.01 | 124 |
| 2002 | 34.33 | 118 |
| 2001 | 39.62 | 91 |
| 2000 | 41.03 | 84 |
| 1999 | 43.84 | 70 |
| 1998 | 46.5 | 56 |
| 1997 | 47.72 | 51 |
| 1996 | 49.78 | 48 |
| 1995 | 47.48 | 57 |
| 1994 | 47.46 | 61 |
| 1993 | 45.85 | 65 |
| 1992 | 45.7 | 73 |
| 1991 | 44.58 | 84 |