年度 | 实际值 |
---|---|
1995 | 22 |
1996 | 22 |
1997 | 17.95 |
1998 | 17.9 |
1999 | 16 |
2000 | 14.3 |
2001 | 13.5 |
2002 | 12.2 |
2003 | 11.1 |
2004 | 10.73 |
2005 | 9.81 |
2006 | 8.98 |
2007 | 8.3 |
2008 | 8.02 |
2009 | |
2010 | 7.67 |
2011 | 7.37 |
2012 | 7.14 |
2013 | 7.5 |
2014 | 7.11 |
2015 | 6.84 |
2016 | 6.75 |
2017 | |
2018 | 6.51 |