| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 70.61 | 51 |
| 2015 | 74.1 | 56 |
| 2014 | 82.39 | 48 |
| 2013 | 83.23 | 53 |
| 2012 | 87 | 52 |
| 2011 | 86.87 | 52 |
| 2010 | 83.5 | 49 |
| 2009 | 89.91 | 32 |
| 2008 | 89.56 | 51 |
| 2007 | 79.76 | 58 |
| 2006 | 81.18 | 57 |
| 2005 | 81.21 | 55 |
| 2004 | 82.3 | 46 |
| 2003 | 87.66 | 40 |
| 2002 | 89.98 | 35 |
| 2001 | 85.68 | 42 |
| 2000 | 83.48 | 47 |
| 1999 | 85.24 | 35 |
| 1998 | 89.11 | 27 |
| 1997 | 89.85 | 29 |
| 1996 | 97.25 | 23 |
| 1995 | 94.91 | 19 |
| 1994 | 99.43 | 18 |
| 1993 | 97.16 | 16 |
| 1992 | 92.82 | 15 |
| 1991 | 105.09 | 14 |
| 1990 | 91.29 | 21 |
| 1989 | 91.84 | 24 |
| 1988 | 91.13 | 22 |
| 1987 | 92.32 | 17 |
| 1986 | 104 | 11 |