年度 | 实际值 |
---|---|
1995 | 20.3 |
1996 | 21 |
1997 | 16.01 |
1998 | 16.9 |
1999 | 16.3 |
2000 | 15.1 |
2001 | 15.03 |
2002 | 14.19 |
2003 | 12.81 |
2004 | 12.89 |
2005 | 11.94 |
2006 | 10.87 |
2007 | 9.82 |
2008 | 9.5 |
2009 | |
2010 | 8.75 |
2011 | 9.14 |
2012 | 9.75 |
2013 | 10.44 |
2014 | 10.21 |
2015 | 9.8 |
2016 | 9.68 |
2017 | |
2018 | 7.53 |