| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2014 | 101.05 | 65 |
| 2013 | 95.34 | 78 |
| 2012 | 100.28 | 76 |
| 2011 | 99.85 | 77 |
| 2010 | 94.44 | 76 |
| 2009 | 88.04 | 74 |
| 2008 | 99.98 | 75 |
| 2007 | 102.22 | 62 |
| 2006 | 117.82 | 47 |
| 2005 | 104.34 | 53 |
| 2004 | 101.57 | 57 |
| 2003 | 98.77 | 56 |
| 2002 | 101.09 | 50 |
| 2001 | 92.16 | 59 |
| 2000 | 87.52 | 68 |
| 1999 | 80.97 | 77 |
| 1998 | 81.88 | 79 |
| 1997 | 85.98 | 69 |
| 1996 | 75.49 | 83 |
| 1995 | 77.52 | 77 |
| 1994 | 71.56 | 77 |
| 1993 | 60.31 | 90 |
| 1992 | 83.94 | 54 |
| 1991 | 80.95 | 49 |
| 1990 | 85.95 | 45 |
| 1989 | 81.44 | 51 |
| 1988 | 76.2 | 53 |
| 1987 | 83.83 | 45 |
| 1986 | 93.05 | 42 |