年度 | 实际值 |
---|---|
2000 | 12 |
2001 | 10.8 |
2002 | 10.8 |
2003 | 11.4 |
2004 | 11.2 |
2005 | 13 |
2006 | 12.5 |
2007 | 11.7956718 |
2008 | 9.6 |
2009 | 10.6001219824271 |
2010 | 13.9 |
2011 | 13.835467205587 |
2012 | 14.4033439770355 |
2013 | 13.6 |
2014 | 13.5 |
2015 | 10.2864312313371 |
2016 | 9.9 |
2017 | 12.2 |
2018 | 5.4 |