| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 78.82 | 9 |
| 2015 | 79.472 | 11 |
| 2014 | 79.935 | 11 |
| 2013 | 79.873 | 11 |
| 2012 | 81.349 | 11 |
| 2011 | 80.883 | 12 |
| 2010 | 79.228 | 16 |
| 2009 | 75.788 | 23 |
| 2008 | 75.716 | 20 |
| 2007 | 76.948 | 16 |
| 2006 | 76.589 | 19 |
| 2005 | 81.165 | 7 |
| 2004 | 82.874 | 4 |
| 2003 | 82.87 | 5 |
| 2002 | 83.1 | 5 |
| 2001 | 83.527 | 7 |
| 2000 | 82.737 | 6 |
| 1999 | 82.621 | 4 |
| 1998 | 83.49 | 4 |
| 1997 | 83.53 | 4 |
| 1996 | 83.868 | 4 |
| 1995 | 83.393 | 4 |
| 1994 | 83.785 | 3 |
| 1993 | 83.433 | 2 |
| 1992 | 82.446 | 2 |
| 1991 | 81.259 | 2 |
| 1990 | 81.924 | 2 |
| 1989 | 80.512 | 2 |
| 1988 | 81.461 | 2 |
| 1987 | 81.763 | 3 |
| 1986 | 82.705 | 3 |