| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 153.31 | 13 |
| 2015 | 159.78 | 14 |
| 2014 | 158.73 | 18 |
| 2013 | 147.98 | 18 |
| 2012 | 147.54 | 22 |
| 2011 | 138.78 | 27 |
| 2010 | 129.25 | 27 |
| 2009 | 113.74 | 35 |
| 2008 | 124.56 | 42 |
| 2007 | 130.66 | 35 |
| 2006 | 127.84 | 33 |
| 2005 | 122.28 | 35 |
| 2004 | 114.05 | 45 |
| 2003 | 95.33 | 60 |
| 2002 | 91.77 | 65 |
| 2001 | 99.53 | 52 |
| 2000 | 98.51 | 55 |
| 1999 | 86.46 | 66 |
| 1998 | 84.84 | 73 |
| 1997 | 85.31 | 71 |
| 1996 | 81.75 | 74 |
| 1995 | 84.23 | 63 |
| 1994 | 76 | 72 |
| 1993 | 79.45 | 59 |
| 1992 | 79.21 | 59 |
| 1991 | 71.91 | 66 |
| 1990 | 64.06 | 80 |