年度 | 实际值 |
---|---|
1995 | 12.8 |
1996 | 11.7 |
1997 | 9.51 |
1998 | 9.1 |
1999 | 8.9 |
2000 | 8.1 |
2001 | 7.64 |
2002 | 7.05 |
2003 | 6.28 |
2004 | 5.72 |
2005 | 5.4 |
2006 | 4.85 |
2007 | 4.4 |
2008 | 4.22 |
2009 | |
2010 | 4.24 |
2011 | 4.21 |
2012 | 4.08 |
2013 | 3.88 |
2014 | 3.62 |
2015 | 3.56 |
2016 | 3.48 |
2017 | |
2018 | 2.85 |