年度 | 实际值 |
---|---|
1995 | 16 |
1996 | 15.1 |
1997 | 14.12 |
1998 | 10.9 |
1999 | 11.9 |
2000 | 11.1 |
2001 | 10.49 |
2002 | 10 |
2003 | 8.8 |
2004 | 8.5 |
2005 | 10.01 |
2006 | 9.27 |
2007 | 9.28 |
2008 | 9.46 |
2009 | |
2010 | 8.25 |
2011 | 7.92 |
2012 | 7.8 |
2013 | 7.69 |
2014 | 7.48 |
2015 | 7.41 |
2016 | 7.37 |
2017 | |
2018 | 6.67 |