年度 | 实际值 |
---|---|
1995 | 30.1 |
1996 | 28.6 |
1997 | 2.9 |
1998 | 25.9 |
1999 | |
2000 | 20.6 |
2001 | 21.88 |
2002 | 18.53 |
2003 | 17.22 |
2004 | 18.69 |
2005 | 15.74 |
2006 | 16.8 |
2007 | 17.5 |
2008 | 17.58 |
2009 | |
2010 | 15.33 |
2011 | 12.09 |
2012 | 12.05 |
2013 | 11.54 |
2014 | 10.54 |
2015 | 9.72 |
2016 | 9.4 |
2017 | 8.5 |
2018 | 9.15 |