年度 | 实际值 |
---|---|
1995 | 19.9 |
1996 | 18.5 |
1997 | 17.5 |
1998 | 16.3 |
1999 | 15 |
2000 | 14.5 |
2001 | 13.62 |
2002 | 12.67 |
2003 | 11.31 |
2004 | 11.28 |
2005 | 11.26 |
2006 | 9.88 |
2007 | 9.08 |
2008 | 8.5 |
2009 | |
2010 | 8.13 |
2011 | 7.44 |
2012 | 7.25 |
2013 | 7.05 |
2014 | 6.76 |
2015 | 6.89 |
2016 | 5.71 |
2017 | |
2018 | 5.88 |