年度 | 实际值 |
---|---|
1995 | 20.7 |
1996 | 19.1 |
1997 | 20.02 |
1998 | 19.8 |
1999 | 15.6 |
2000 | 15 |
2001 | 16.57 |
2002 | 14.98 |
2003 | 14.3 |
2004 | 14.54 |
2005 | 14.88 |
2006 | 13.81 |
2007 | 13.78 |
2008 | 14.31 |
2009 | |
2010 | 13.48 |
2011 | 13 |
2012 | 13.33 |
2013 | 13.11 |
2014 | 13.18 |
2015 | 14.49 |
2016 | 16.89 |
2017 | |
2018 | 15.2 |