年度 | 实际值 |
---|---|
1992 | 4.2 |
1993 | |
1994 | |
1995 | 4 |
1996 | |
1997 | |
1998 | |
1999 | 3 |
2000 | 1.69 |
2001 | 4.6 |
2002 | 4.63 |
2003 | 4.62 |
2004 | 4.3 |
2005 | 4.16 |
2006 | 4.05 |
2007 | 3.89 |
2008 | 3.76 |
2009 | 3.83 |
2010 | 3.9 |
2011 | 3.83 |
2012 | 3.77 |
2013 | 3.48 |
2014 | 3.38 |
2015 | 3.32 |