年度 | 实际值 |
---|---|
1995 | 23.6 |
1996 | 22.7 |
1997 | 20.89 |
1998 | 20.8 |
1999 | 21.9 |
2000 | 20.4 |
2001 | 18.61 |
2002 | 16.81 |
2003 | 15.53 |
2004 | 14.47 |
2005 | 13.69 |
2006 | 12.31 |
2007 | 11.55 |
2008 | 11.3 |
2009 | |
2010 | 10.69 |
2011 | 10.14 |
2012 | 9.73 |
2013 | 9.8 |
2014 | 9.53 |
2015 | 8.8 |
2016 | 8.8 |
2017 | |
2018 | 8.31 |