年度 | 实际值 |
---|---|
1995 | 25.5 |
1996 | 21.8 |
1997 | 21.86 |
1998 | 20.4 |
1999 | 19 |
2000 | 17.5 |
2001 | 16.68 |
2002 | 16.01 |
2003 | 14.49 |
2004 | 13.35 |
2005 | 13.66 |
2006 | 12.71 |
2007 | 12.98 |
2008 | 11.57 |
2009 | |
2010 | 13.04 |
2011 | 12.57 |
2012 | 12.69 |
2013 | 12.9 |
2014 | 13.09 |
2015 | 12.81 |
2016 | 12.5 |
2017 | |
2018 | 9.07 |