年度 | 实际值 |
---|---|
1995 | 10 |
1996 | 9.2 |
1997 | 8.64 |
1998 | 7.9 |
1999 | 7.2 |
2000 | 6.7 |
2001 | 6.31 |
2002 | 6 |
2003 | 5.72 |
2004 | 5.27 |
2005 | 4.9 |
2006 | 4.47 |
2007 | 4.11 |
2008 | 3.65 |
2009 | |
2010 | 3.06 |
2011 | 2.94 |
2012 | 3.76 |
2013 | 3.71 |
2014 | 3.48 |
2015 | 3.3 |
2016 | 3.28 |
2017 | |
2018 | 2.44 |