| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 65.23 | 62 |
| 2015 | 67.79 | 69 |
| 2014 | 69.43 | 72 |
| 2013 | 67.74 | 81 |
| 2012 | 65.71 | 87 |
| 2011 | 64.11 | 96 |
| 2010 | 59.58 | 97 |
| 2009 | 52.33 | 109 |
| 2008 | 60.94 | 110 |
| 2007 | 63.38 | 97 |
| 2006 | 59.57 | 108 |
| 2005 | 52.33 | 121 |
| 2004 | 48.63 | 125 |
| 2003 | 40.14 | 143 |
| 2002 | 33.63 | 157 |
| 2001 | 33.27 | 159 |
| 2000 | 33.75 | 158 |
| 1999 | 29.39 | 159 |
| 1998 | 29.83 | 159 |
| 1997 | 33.73 | 152 |
| 1996 | 28.63 | 160 |
| 1995 | 20.16 | 175 |
| 1994 | 19.69 | 169 |