年度 | 实际值 |
---|---|
1995 | 29.7 |
1996 | 28.7 |
1997 | 26.87 |
1998 | 25.6 |
1999 | 22.5 |
2000 | 20.5 |
2001 | 19.94 |
2002 | 18.3 |
2003 | 16.13 |
2004 | 16.02 |
2005 | 18.29 |
2006 | 17.32 |
2007 | 15.67 |
2008 | 15.62 |
2009 | |
2010 | 14.81 |
2011 | 14 |
2012 | 13.9 |
2013 | 14.09 |
2014 | 14.01 |
2015 | 11.78 |
2016 | 13.02 |
2017 | |
2018 | 11.54 |