年度 | 实际值 |
---|---|
1995 | 16.9 |
1996 | 17.7 |
1997 | 14.71 |
1998 | 17.9 |
1999 | 18 |
2000 | 15.8 |
2001 | 15.72 |
2002 | 15.48 |
2003 | 14.57 |
2004 | 15.33 |
2005 | 14.61 |
2006 | 14.47 |
2007 | 12.1 |
2008 | 11.03 |
2009 | |
2010 | 10.21 |
2011 | 8.28 |
2012 | 7.63 |
2013 | 7.56 |
2014 | 7.25 |
2015 | 7.42 |
2016 | 7.03 |
2017 | 6.7 |
2018 | 6.6 |