| 时间 |
值 （%） |
世界排名 |
| 2016 |
5.5 |
101 |
| 2015 |
5.5 |
106 |
| 2014 |
5.5 |
116 |
| 2013 |
5.5 |
118 |
| 2012 |
5.5 |
122 |
| 2011 |
5.5 |
123 |
| 2010 |
5.5 |
124 |
| 2009 |
5.5 |
129 |
| 2008 |
5.5 |
138 |
| 2007 |
5.5 |
153 |
| 2006 |
5.5 |
147 |
| 2005 |
5.5 |
141 |
| 2004 |
5.5 |
140 |
| 2003 |
5.5 |
138 |
| 2002 |
5.5 |
140 |
| 2001 |
5.5 |
142 |
| 2000 |
5.5 |
144 |
| 1999 |
5.5 |
143 |
| 1998 |
6.5 |
136 |