| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 57.67 | 99 |
| 2015 | 57.55 | 99 |
| 2014 | 57.36 | 98 |
| 2013 | 57.1 | 98 |
| 2012 | 56.7 | 100 |
| 2011 | 56.48 | 101 |
| 2010 | 55.28 | 105 |
| 2009 | 54.78 | 111 |
| 2008 | 54.77 | 114 |
| 2007 | 54.07 | 119 |
| 2006 | 52.84 | 124 |
| 2005 | 51.96 | 125 |
| 2004 | 51.78 | 124 |
| 2003 | 51.87 | 126 |
| 2002 | 53.14 | 114 |
| 2001 | 53.89 | 116 |
| 2000 | 53.92 | 115 |
| 1999 | 53.58 | 115 |
| 1998 | 53.3 | 116 |
| 1997 | 52.96 | 118 |
| 1996 | 53.4 | 117 |
| 1995 | 53.69 | 117 |
| 1994 | 53.39 | 119 |
| 1993 | 54.26 | 112 |
| 1992 | 55.35 | 103 |
| 1991 | 56.44 | 97 |