| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 74.91 | 51 |
| 2015 | 75.21 | 50 |
| 2014 | 74.63 | 52 |
| 2013 | 74.75 | 51 |
| 2012 | 75.56 | 44 |
| 2011 | 75.21 | 47 |
| 2010 | 75.27 | 45 |
| 2009 | 74.52 | 48 |
| 2008 | 74.5 | 54 |
| 2007 | 74.89 | 51 |
| 2006 | 74.24 | 55 |
| 2005 | 72.68 | 61 |
| 2004 | 71.89 | 66 |
| 2003 | 72.27 | 62 |
| 2002 | 73.03 | 59 |
| 2001 | 75.13 | 55 |
| 2000 | 75.5 | 51 |
| 1999 | 75 | 53 |
| 1998 | 75.93 | 50 |
| 1997 | 77.21 | 44 |
| 1996 | 77.32 | 44 |
| 1995 | 76.36 | 52 |
| 1994 | 78.26 | 40 |
| 1993 | 78.03 | 43 |
| 1992 | 78.25 | 45 |
| 1991 | 79.32 | 38 |