| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 156.24 | 15 |
| 2014 | 175.56 | 10 |
| 2013 | 189.78 | 7 |
| 2012 | 185.89 | 7 |
| 2011 | 171.88 | 9 |
| 2010 | 120.47 | 35 |
| 2009 | 117.96 | 31 |
| 2008 | 145.88 | 20 |
| 2007 | 137.79 | 23 |
| 2006 | 147.1 | 16 |
| 2005 | 148.31 | 12 |
| 2004 | 140.74 | 17 |
| 2003 | 128.09 | 26 |
| 2002 | 130.61 | 22 |
| 2001 | 127.03 | 26 |
| 2000 | 135.81 | 22 |
| 1999 | 141.83 | 13 |
| 1998 | 128.49 | 19 |
| 1997 | 148.58 | 12 |
| 1996 | 164.12 | 9 |
| 1995 | 152.46 | 10 |
| 1994 | 155.18 | 14 |
| 1993 | 164.6 | 7 |
| 1992 | 181.12 | 5 |
| 1991 | 180.64 | 6 |
| 1990 | 210.16 | 3 |
| 1989 | 186.27 | 5 |
| 1988 | 172.83 | 6 |
| 1987 | 189.77 | 5 |
| 1986 | 183.52 | 6 |