年度 | 实际值 |
---|---|
1992 | 4 |
1993 | 3.8 |
1994 | |
1995 | 6.91 |
1996 | 8.03 |
1997 | |
1998 | |
1999 | |
2000 | 5.77 |
2001 | 5.25 |
2002 | 3.32 |
2003 | 3.74 |
2004 | 3.65 |
2005 | 4.53 |
2006 | 4.39 |
2007 | 6.1 |
2008 | 7.38 |
2009 | 6.06 |
2010 | 5.29 |
2011 | 6.34 |
2012 | 4.91 |
2013 | 5.08 |
2014 | 4.18 |
2015 | 2.87 |