年度 | 实际值 |
---|---|
1992 | 3.3 |
1993 | |
1994 | |
1995 | 3.7 |
1996 | |
1997 | |
1998 | |
1999 | 4.8 |
2000 | 4.9 |
2001 | 5 |
2002 | 5.4 |
2003 | 6 |
2004 | 6 |
2005 | 6 |
2006 | 6 |
2007 | 6 |
2008 | 6 |
2009 | 6 |
2010 | 7 |
2011 | 7 |
2012 | 7 |
2013 | 7 |
2014 | 7 |
2015 | 7 |
2016 | 7.1 |
2017 | 7 |
2018 | 6.9607 |