年度 | 实际值 |
---|---|
1992 | 19.3 |
1993 | |
1994 | |
1995 | 18 |
1996 | |
1997 | |
1998 | |
1999 | 16 |
2000 | 7.79 |
2001 | 16.8 |
2002 | 16.71 |
2003 | 16.59 |
2004 | 16.63 |
2005 | 16.62 |
2006 | 16.65 |
2007 | 16.78 |
2008 | 16.75 |
2009 | 16.65 |
2010 | 16.44 |
2011 | 16.13 |
2012 | 15.84 |
2013 | 15.61 |
2014 | 15.57 |
2015 | 14.79 |