年度 | 实际值 |
---|---|
1995 | 17.6 |
1996 | 18.7 |
1997 | 18.45 |
1998 | 17.8 |
1999 | 16.7 |
2000 | 15.2 |
2001 | 14.35 |
2002 | 13.74 |
2003 | 12.11 |
2004 | 11.56 |
2005 | 10.8 |
2006 | 9.88 |
2007 | 9.35 |
2008 | 8.76 |
2009 | |
2010 | 7.7 |
2011 | 7.41 |
2012 | 7.5 |
2013 | 7.24 |
2014 | 7.15 |
2015 | 7.32 |
2016 | 9.6 |
2017 | |
2018 | 7.62 |