| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 30.45 | 127 |
| 2015 | 30.29 | 125 |
| 2014 | 29.94 | 123 |
| 2013 | 30.14 | 124 |
| 2012 | 30.39 | 126 |
| 2011 | 30.56 | 124 |
| 2010 | 30.64 | 125 |
| 2009 | 30.67 | 128 |
| 2008 | 31.38 | 133 |
| 2007 | 31.43 | 132 |
| 2006 | 31.5 | 135 |
| 2005 | 31.62 | 130 |
| 2004 | 32.46 | 129 |
| 2003 | 33.37 | 118 |
| 2002 | 34.75 | 116 |
| 2001 | 36.18 | 112 |
| 2000 | 37.64 | 103 |
| 1999 | 39.11 | 99 |
| 1998 | 37.53 | 105 |
| 1997 | 38.91 | 99 |
| 1996 | 40.32 | 92 |
| 1995 | 41.76 | 89 |
| 1994 | 43.19 | 82 |
| 1993 | 43.05 | 87 |
| 1992 | 44.08 | 85 |
| 1991 | 45.1 | 80 |