| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 236.71 | 3 |
| 2014 | 237.43 | 3 |
| 2013 | 235.34 | 3 |
| 2012 | 231.16 | 3 |
| 2011 | 227.85 | 3 |
| 2010 | 217.49 | 4 |
| 2009 | 218.5 | 4 |
| 2008 | 201.24 | 4 |
| 2007 | 195.68 | 4 |
| 2006 | 196.22 | 4 |
| 2005 | 198.72 | 4 |
| 2004 | 198.94 | 4 |
| 2003 | 199.84 | 3 |
| 2002 | 198.54 | 2 |
| 2001 | 194.09 | 3 |
| 2000 | 232.87 | 1 |
| 1999 | 232.92 | 1 |
| 1998 | 223.04 | 1 |
| 1997 | 213.72 | 1 |
| 1996 | 205.19 | 1 |
| 1995 | 202.78 | 1 |
| 1994 | 199.12 | 1 |
| 1993 | 192.99 | 1 |
| 1992 | 185.95 | 1 |
| 1991 | 184.38 | 2 |
| 1990 | 185.2 | 2 |
| 1989 | 187.13 | 1 |
| 1988 | 181.6 | 1 |
| 1987 | 178.97 | 1 |
| 1986 | 170.09 | 1 |