| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 70.87 | 77 |
| 2015 | 73 | 66 |
| 2014 | 74.3 | 55 |
| 2013 | 74.27 | 55 |
| 2012 | 74.59 | 54 |
| 2011 | 74.67 | 51 |
| 2010 | 75.04 | 48 |
| 2009 | 75 | 46 |
| 2008 | 75.29 | 47 |
| 2007 | 74.21 | 57 |
| 2006 | 74.21 | 56 |
| 2005 | 74.64 | 53 |
| 2004 | 73.4 | 56 |
| 2003 | 72.48 | 61 |
| 2002 | 73.15 | 58 |
| 2001 | 73.38 | 60 |
| 2000 | 72.93 | 63 |
| 1999 | 72.97 | 67 |
| 1998 | 72.98 | 68 |
| 1997 | 75.55 | 53 |
| 1996 | 75.52 | 55 |
| 1995 | 78.17 | 41 |
| 1994 | 78.03 | 43 |
| 1993 | 78.1 | 42 |
| 1992 | 77.99 | 47 |
| 1991 | 78.71 | 40 |