| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 50.08 | 76 |
| 2015 | 50.42 | 74 |
| 2014 | 50.55 | 76 |
| 2013 | 50.49 | 76 |
| 2012 | 49.94 | 75 |
| 2011 | 49.87 | 77 |
| 2010 | 48.82 | 81 |
| 2009 | 48.44 | 84 |
| 2008 | 49.79 | 78 |
| 2007 | 48.24 | 86 |
| 2006 | 48.93 | 83 |
| 2005 | 47.6 | 86 |
| 2004 | 45.67 | 92 |
| 2003 | 42.41 | 112 |
| 2002 | 40.76 | 116 |
| 2001 | 40.28 | 114 |
| 2000 | 39.41 | 120 |
| 1999 | 38.92 | 120 |
| 1998 | 38.01 | 124 |
| 1997 | 37.74 | 125 |
| 1996 | 37.03 | 124 |
| 1995 | 35.61 | 127 |
| 1994 | 34.4 | 132 |
| 1993 | 33.07 | 138 |
| 1992 | 33.22 | 137 |
| 1991 | 34.03 | 132 |