年度 | 实际值 |
---|---|
1995 | 25.3 |
1996 | 25.6 |
1997 | 23.37 |
1998 | 24.4 |
1999 | 23.9 |
2000 | 22.5 |
2001 | 20.99 |
2002 | 19.46 |
2003 | 19.5 |
2004 | 20.1 |
2005 | 17.55 |
2006 | 16.1 |
2007 | 13.26 |
2008 | 12.43 |
2009 | |
2010 | 11.38 |
2011 | 11.18 |
2012 | 10.65 |
2013 | 9.81 |
2014 | 9.3 |
2015 | 8.62 |
2016 | 8.03 |
2017 | |
2018 | 6.97 |