| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 75.73 | 46 |
| 2015 | 75.7 | 46 |
| 2014 | 75.76 | 43 |
| 2013 | 75.81 | 44 |
| 2012 | 75.93 | 41 |
| 2011 | 75.82 | 40 |
| 2010 | 75.7 | 42 |
| 2009 | 75.58 | 42 |
| 2008 | 75.42 | 45 |
| 2007 | 75.81 | 44 |
| 2006 | 78.3 | 31 |
| 2005 | 79.4 | 28 |
| 2004 | 78.58 | 29 |
| 2003 | 77.69 | 35 |
| 2002 | 76.77 | 41 |
| 2001 | 75.82 | 51 |
| 2000 | 74.87 | 55 |
| 1999 | 73.94 | 58 |
| 1998 | 73.39 | 63 |
| 1997 | 73.39 | 65 |
| 1996 | 73.42 | 67 |
| 1995 | 73.47 | 69 |
| 1994 | 73.86 | 70 |
| 1993 | 73.68 | 70 |
| 1992 | 74.01 | 69 |
| 1991 | 73.9 | 71 |