年度 | 实际值 |
---|---|
1992 | 17 |
1993 | |
1994 | |
1995 | 18.1 |
1996 | |
1997 | |
1998 | |
1999 | 18.9 |
2000 | 18.5 |
2001 | 19 |
2002 | 18.9 |
2003 | 19 |
2004 | 19 |
2005 | 18.9 |
2006 | 19.3 |
2007 | 19.6854 |
2008 | 20.14 |
2009 | 20.5 |
2010 | 21.2756 |
2011 | 21.56 |
2012 | 21.4931 |
2013 | 21.27 |
2014 | 21.95 |
2015 | 21.97 |
2016 | 21.8938 |
2017 | 22 |