| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 73.56 | 22 |
| 2015 | 73.87 | 22 |
| 2014 | 74.18 | 22 |
| 2013 | 74.49 | 22 |
| 2012 | 74.8 | 22 |
| 2011 | 75.11 | 22 |
| 2010 | 75.41 | 23 |
| 2009 | 75.71 | 24 |
| 2008 | 76.02 | 25 |
| 2007 | 76.31 | 26 |
| 2006 | 76.61 | 26 |
| 2005 | 76.9 | 25 |
| 2004 | 77.19 | 24 |
| 2003 | 77.48 | 24 |
| 2002 | 77.77 | 22 |
| 2001 | 78.05 | 21 |
| 2000 | 78.33 | 21 |
| 1999 | 78.62 | 21 |
| 1998 | 78.93 | 21 |
| 1997 | 79.23 | 21 |
| 1996 | 79.54 | 21 |
| 1995 | 79.84 | 21 |
| 1994 | 80.13 | 22 |
| 1993 | 80.43 | 22 |
| 1992 | 80.72 | 22 |
| 1991 | 81 | 22 |
| 1990 | 81.29 | 22 |
| 1989 | 81.57 | 21 |
| 1988 | 81.99 | 21 |
| 1987 | 82.43 | 21 |
| 1986 | 82.86 | 19 |