年度 | 实际值 |
---|---|
1995 | 31 |
1996 | 28.2 |
1997 | 27.26 |
1998 | 19.8 |
1999 | 20.4 |
2000 | 19 |
2001 | 19.7 |
2002 | 18.47 |
2003 | 16.83 |
2004 | 16.58 |
2005 | 16.8 |
2006 | 15.44 |
2007 | 13.69 |
2008 | 11.97 |
2009 | |
2010 | 9.5 |
2011 | 8.57 |
2012 | 8.33 |
2013 | 8.12 |
2014 | 7.68 |
2015 | 7.4 |
2016 | 7.28 |
2017 | |
2018 | 7.01 |