年度 | 实际值 |
---|---|
1995 | 25.1 |
1996 | 25.2 |
1997 | 22.96 |
1998 | 21.8 |
1999 | 21 |
2000 | 19.8 |
2001 | 19.6 |
2002 | 18.56 |
2003 | 17.74 |
2004 | 13.4 |
2005 | 11.35 |
2006 | 9.51 |
2007 | 7.52 |
2008 | 7.65 |
2009 | |
2010 | 7.21 |
2011 | 7.1 |
2012 | 7 |
2013 | 7.04 |
2014 | 7.15 |
2015 | 7.06 |
2016 | 7.21 |
2017 | |
2018 | 7.14 |