年度 | 实际值 |
---|---|
1995 | 27.5 |
1996 | 23.4 |
1997 | 21.27 |
1998 | 21.2 |
1999 | 19.1 |
2000 | 17.2 |
2001 | 16.49 |
2002 | 15.09 |
2003 | 14.49 |
2004 | 15.32 |
2005 | 16.22 |
2006 | 14.7 |
2007 | 13.17 |
2008 | 12.3 |
2009 | |
2010 | 11.66 |
2011 | 10.82 |
2012 | 11.06 |
2013 | 10.24 |
2014 | 9.45 |
2015 | 8.33 |
2016 | 7.33 |
2017 | |
2018 | 6.33 |