年度 | 实际值 |
---|---|
1995 | 19.5 |
1996 | 19.2 |
1997 | 15.27 |
1998 | 14 |
1999 | 13.4 |
2000 | 12.4 |
2001 | 13.13 |
2002 | 12.34 |
2003 | 11.74 |
2004 | 12.44 |
2005 | 10.24 |
2006 | 10.42 |
2007 | 10.46 |
2008 | 10.97 |
2009 | |
2010 | 10.68 |
2011 | 10.93 |
2012 | 10.42 |
2013 | 10.2 |
2014 | 9.82 |
2015 | 9.24 |
2016 | 8.87 |
2017 | |
2018 | 7.21 |