年度 | 实际值 |
---|---|
2000 | 7 |
2001 | 6.2 |
2002 | 4.6 |
2003 | 15.2 |
2004 | 21 |
2005 | 10.6 |
2006 | 18.1 |
2007 | 14.2573418425443 |
2008 | 8.65021704881615 |
2009 | 9.59999999999999 |
2010 | 19.7 |
2011 | 25.6804959137742 |
2012 | 24.1 |
2013 | 19.1 |
2014 | 8.1 |
2015 | 11.3572931426854 |