年度 | 实际值 |
---|---|
1995 | 28.4 |
1996 | 25.5 |
1997 | 22.64 |
1998 | 21.3 |
1999 | 16.6 |
2000 | 15.3 |
2001 | 13.88 |
2002 | 12.81 |
2003 | 11.06 |
2004 | 9.8 |
2005 | 9.24 |
2006 | 8.52 |
2007 | 8.07 |
2008 | 7.43 |
2009 | |
2010 | 7.92 |
2011 | 8.11 |
2012 | 7.7 |
2013 | 7.98 |
2014 | 7.44 |
2015 | 7.23 |
2016 | 7.14 |
2017 | |
2018 | 7.72 |