| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 112.04 | 36 |
| 2014 | 104.5 | 56 |
| 2013 | 101.06 | 71 |
| 2012 | 103.57 | 70 |
| 2011 | 103 | 69 |
| 2010 | 108.41 | 51 |
| 2009 | 125.48 | 22 |
| 2008 | 121.21 | 46 |
| 2007 | 106.3 | 53 |
| 2006 | 87.03 | 98 |
| 2005 | 80.76 | 99 |
| 2004 | 81.89 | 95 |
| 2003 | 95.86 | 59 |
| 2002 | 94.08 | 60 |
| 2001 | 88.85 | 64 |
| 2000 | 85.43 | 74 |
| 1999 | 92.28 | 58 |
| 1998 | 93.25 | 58 |
| 1997 | 94.02 | 55 |
| 1996 | 97.62 | 46 |
| 1995 | 94.42 | 48 |
| 1994 | 90.23 | 53 |
| 1993 | 97.07 | 43 |
| 1992 | 91.47 | 48 |
| 1991 | 93.37 | 40 |
| 1990 | 93.28 | 41 |
| 1989 | 95.92 | 38 |
| 1988 | 90.59 | 39 |
| 1987 | 97.41 | 32 |
| 1986 | 102.28 | 26 |