年度 | 实际值 |
---|---|
1995 | 19.8 |
1996 | 20.6 |
1997 | 19.81 |
1998 | 17.3 |
1999 | 15.2 |
2000 | 14.4 |
2001 | 14.32 |
2002 | 13.41 |
2003 | 13.81 |
2004 | 15.51 |
2005 | 15.43 |
2006 | 14.37 |
2007 | 15.85 |
2008 | 14.19 |
2009 | |
2010 | 10.74 |
2011 | 9.12 |
2012 | 8.62 |
2013 | 8.38 |
2014 | 8.13 |
2015 | 8.26 |
2016 | 8.08 |
2017 | |
2018 | 5.79 |