| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 49.01 | 119 |
| 2015 | 48.95 | 120 |
| 2014 | 48.91 | 119 |
| 2013 | 48.28 | 121 |
| 2012 | 49.3 | 113 |
| 2011 | 49.18 | 113 |
| 2010 | 49.9 | 109 |
| 2009 | 52.78 | 92 |
| 2008 | 52.64 | 91 |
| 2007 | 54.08 | 82 |
| 2006 | 56.57 | 68 |
| 2005 | 55.26 | 73 |
| 2004 | 57.44 | 61 |
| 2003 | 53.85 | 79 |
| 2002 | 52.9 | 82 |
| 2001 | 52.08 | 88 |
| 2000 | 51.34 | 89 |
| 1999 | 50.34 | 92 |
| 1998 | 49.08 | 97 |
| 1997 | 48.33 | 102 |
| 1996 | 47.66 | 107 |
| 1995 | 46.82 | 110 |
| 1994 | 45.97 | 111 |
| 1993 | 45.22 | 113 |
| 1992 | 44.36 | 115 |
| 1991 | 43.54 | 119 |
| 1990 | 42.9 | 122 |