| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 90.1 | 58 |
| 2015 | 93.87 | 67 |
| 2014 | 104.63 | 55 |
| 2013 | 105.89 | 57 |
| 2012 | 102.41 | 72 |
| 2011 | 103.26 | 68 |
| 2010 | 104.78 | 59 |
| 2009 | 104.14 | 51 |
| 2008 | 116.02 | 48 |
| 2007 | 116.22 | 47 |
| 2006 | 118.93 | 42 |
| 2005 | 120.99 | 36 |
| 2004 | 123.27 | 35 |
| 2003 | 117.31 | 35 |
| 2002 | 111.43 | 44 |
| 2001 | 117.08 | 36 |
| 2000 | 116.95 | 37 |
| 1999 | 130.8 | 22 |
| 1998 | 131.32 | 17 |
| 1997 | 135.4 | 18 |
| 1996 | 137.26 | 17 |
| 1995 | 145.6 | 12 |
| 1994 | 145.63 | 15 |
| 1993 | 156.54 | 9 |
| 1992 | 158.97 | 9 |
| 1991 | 151.07 | 11 |
| 1990 | 149.27 | 10 |
| 1989 | 143.54 | 10 |
| 1988 | 137.8 | 10 |
| 1987 | 157.23 | 9 |
| 1986 | 171.93 | 7 |