年度 | 实际值 |
---|---|
1995 | 17.5 |
1996 | 16.6 |
1997 | 15.58 |
1998 | 15.5 |
1999 | 14.3 |
2000 | 13.4 |
2001 | 11.6 |
2002 | 11.23 |
2003 | 10.57 |
2004 | 10.48 |
2005 | 9.87 |
2006 | 8.94 |
2007 | 8.12 |
2008 | 8.37 |
2009 | |
2010 | 8.01 |
2011 | 7.88 |
2012 | 8.03 |
2013 | 8.36 |
2014 | 8.98 |
2015 | 9.47 |
2016 | 9.31 |
2017 | |
2018 | 7.79 |