| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 91.06 | 56 |
| 2015 | 98.08 | 63 |
| 2014 | 113.07 | 45 |
| 2013 | 114.31 | 50 |
| 2012 | 120.51 | 45 |
| 2011 | 121.51 | 42 |
| 2010 | 117.29 | 39 |
| 2009 | 115.53 | 33 |
| 2008 | 145.31 | 21 |
| 2007 | 146.62 | 17 |
| 2006 | 142.34 | 19 |
| 2005 | 147.54 | 14 |
| 2004 | 135 | 21 |
| 2003 | 115.71 | 38 |
| 2002 | 114.12 | 43 |
| 2001 | 109.28 | 43 |
| 2000 | 110.33 | 42 |
| 1999 | 104.48 | 38 |
| 1998 | 109.05 | 31 |
| 1997 | 120.73 | 26 |
| 1996 | 131.04 | 19 |
| 1995 | 124.59 | 21 |
| 1994 | 118.31 | 24 |
| 1993 | 130.49 | 17 |
| 1992 | 131.64 | 20 |
| 1991 | 137.26 | 15 |
| 1990 | 149.45 | 9 |
| 1989 | 130.46 | 16 |
| 1988 | 108.13 | 25 |
| 1987 | 90.78 | 39 |
| 1986 | 81.84 | 48 |