年度 | 实际值 |
---|---|
1992 | 27.9 |
1993 | |
1994 | |
1995 | 26 |
1996 | |
1997 | |
1998 | |
1999 | 25 |
2000 | 25.1 |
2001 | 29.7 |
2002 | 29.64 |
2003 | 28.95 |
2004 | 28.35 |
2005 | 28.13 |
2006 | 28.14 |
2007 | 28.12 |
2008 | 28.11 |
2009 | 28.15 |
2010 | 28.21 |
2011 | 28.13 |
2012 | 27.83 |
2013 | 27.7 |
2014 | 27.63 |
2015 | 27.05 |