| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 118.8 | 13 |
| 2015 | 113.73 | 16 |
| 2014 | 109.13 | 16 |
| 2013 | 106.13 | 17 |
| 2012 | 101.8 | 17 |
| 2011 | 100.3 | 18 |
| 2010 | 100.99 | 19 |
| 2009 | 94.48 | 23 |
| 2008 | 97.79 | 21 |
| 2007 | 90.6 | 25 |
| 2006 | 83.46 | 29 |
| 2005 | 78.48 | 30 |
| 2004 | 77.41 | 29 |
| 2003 | 74.74 | 31 |
| 2002 | 70.44 | 38 |
| 2001 | 70.3 | 35 |
| 2000 | 67.64 | 31 |
| 1999 | 69.45 | 30 |
| 1998 | 65.51 | 30 |
| 1997 | 63.9 | 29 |
| 1996 | 62.66 | 34 |
| 1995 | 60.45 | 36 |
| 1994 | 59.15 | 33 |
| 1993 | 56.53 | 38 |
| 1992 | 56.13 | 34 |
| 1991 | 53.29 | 38 |
| 1990 | 54.06 | 36 |
| 1989 | 52.68 | 38 |
| 1988 | 45.63 | 46 |
| 1987 | 43.89 | 43 |
| 1986 | 41.54 | 48 |