| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 109.16 | 33 |
| 2015 | 103.1 | 54 |
| 2014 | 97.6 | 74 |
| 2013 | 93.11 | 82 |
| 2012 | 90.52 | 89 |
| 2011 | 83.35 | 103 |
| 2010 | 80.85 | 100 |
| 2009 | 69.59 | 117 |
| 2008 | 83.26 | 107 |
| 2007 | 81.03 | 110 |
| 2006 | 80.87 | 108 |
| 2005 | 74.28 | 110 |
| 2004 | 74.85 | 111 |
| 2003 | 61.51 | 134 |
| 2002 | 59.37 | 135 |
| 2001 | 60.19 | 125 |
| 2000 | 24.17 | 177 |
| 1999 | 30.12 | 171 |
| 1998 | 51.53 | 129 |
| 1997 | 45.55 | 146 |
| 1996 | 42.08 | 154 |
| 1995 | 23.22 | 171 |