| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 84.07 | 33 |
| 2015 | 81.37 | 44 |
| 2014 | 87.12 | 42 |
| 2013 | 96.53 | 38 |
| 2012 | 117.93 | 22 |
| 2011 | 112.4 | 22 |
| 2010 | 98.94 | 26 |
| 2009 | 86.01 | 35 |
| 2008 | 97.82 | 39 |
| 2007 | 104.54 | 30 |
| 2006 | 105.11 | 31 |
| 2005 | 95.07 | 38 |
| 2004 | 101.56 | 29 |
| 2003 | 100.42 | 25 |
| 2002 | 99.66 | 20 |
| 2001 | 100.49 | 24 |
| 2000 | 136.23 | 12 |
| 1999 | 116.8 | 16 |
| 1998 | 114.74 | 14 |
| 1997 | 113.16 | 16 |
| 1996 | 126.94 | 11 |
| 1995 | 139.67 | 9 |
| 1994 | 133.96 | 9 |
| 1993 | 130.26 | 8 |
| 1992 | 128.1 | 8 |
| 1991 | 122.33 | 10 |
| 1990 | 121.59 | 9 |
| 1989 | 109.65 | 13 |
| 1988 | 102.35 | 14 |
| 1987 | 99.59 | 13 |
| 1986 | 96.44 | 15 |