年度 | 实际值 |
---|---|
1995 | 27.1 |
1996 | 21 |
1997 | 20.68 |
1998 | 20.1 |
1999 | |
2000 | 18.5 |
2001 | 15.69 |
2002 | 15.87 |
2003 | 14.76 |
2004 | 17.07 |
2005 | 12.39 |
2006 | 10.9 |
2007 | 11.43 |
2008 | 8.68 |
2009 | |
2010 | 7.96 |
2011 | 7.19 |
2012 | 7.08 |
2013 | 6.62 |
2014 | 7.26 |
2015 | 7.57 |
2016 | 7.75 |
2017 | 7.38 |
2018 | 6.28 |