年度 | 实际值 |
---|---|
1995 | 24.9 |
1996 | 22.9 |
1997 | 20.82 |
1998 | 19.7 |
1999 | 19.4 |
2000 | 20 |
2001 | 19.31 |
2002 | 18.8 |
2003 | 17.59 |
2004 | 17.8 |
2005 | 16.91 |
2006 | 15.24 |
2007 | 13.15 |
2008 | 12.87 |
2009 | |
2010 | 10.98 |
2011 | 10.5 |
2012 | 10.04 |
2013 | 9.62 |
2014 | 8.82 |
2015 | 8.87 |
2016 | 9.39 |
2017 | |
2018 | 7.64 |