年度 | 实际值 |
---|---|
1992 | 21 |
1993 | |
1994 | |
1995 | 23 |
1996 | |
1997 | |
1998 | |
1999 | 23 |
2000 | 23 |
2001 | 24 |
2002 | 23.7 |
2003 | 23.8 |
2004 | 23.9 |
2005 | 23.9 |
2006 | 24 |
2007 | 24.1 |
2008 | 24.2 |
2009 | 24.2 |
2010 | 24.1 |
2011 | 24.1 |
2012 | 23.9 |
2013 | 23.76 |
2014 | 23.7 |
2015 | 23.5 |
2016 | 23.4 |
2017 | 23.9 |
2018 | 23.9 |