| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 69.11 | 55 |
| 2015 | 75.45 | 52 |
| 2014 | 87.41 | 40 |
| 2013 | 89.24 | 44 |
| 2012 | 92.57 | 41 |
| 2011 | 93.4 | 42 |
| 2010 | 85.49 | 42 |
| 2009 | 86.53 | 34 |
| 2008 | 113.47 | 26 |
| 2007 | 113.42 | 22 |
| 2006 | 111.26 | 25 |
| 2005 | 117.56 | 14 |
| 2004 | 105.71 | 25 |
| 2003 | 86.56 | 42 |
| 2002 | 81.88 | 45 |
| 2001 | 79.82 | 47 |
| 2000 | 76.78 | 57 |
| 1999 | 68.09 | 62 |
| 1998 | 71.15 | 55 |
| 1997 | 81.95 | 36 |
| 1996 | 88.17 | 30 |
| 1995 | 81.25 | 34 |
| 1994 | 77.03 | 33 |
| 1993 | 85.36 | 22 |
| 1992 | 84.16 | 24 |
| 1991 | 83.74 | 23 |
| 1990 | 88.08 | 24 |
| 1989 | 76.59 | 33 |
| 1988 | 59.76 | 45 |
| 1987 | 53.88 | 59 |
| 1986 | 49.44 | 68 |