年度 | 实际值 |
---|---|
2000 | 8 |
2001 | 5.9 |
2002 | .5 |
2003 | 2.8 |
2004 | 8.2 |
2005 | 9 |
2006 | 8 |
2007 | 15.1313964 |
2008 | 12.0007490274724 |
2009 | 13.1765207175755 |
2010 | 14 |
2011 | 13.98854114178 |
2012 | 10.6502322913078 |
2013 | 11.2 |
2014 | 8.2 |
2015 | 8.59999999999999 |
2016 | 7.1 |
2017 | 7.1 |