年度 | 实际值 |
---|---|
1995 | 16.7 |
1996 | 14.9 |
1997 | 6.86 |
1998 | 13.3 |
1999 | 12.8 |
2000 | 12 |
2001 | 11.12 |
2002 | 10.14 |
2003 | 9.32 |
2004 | 8.87 |
2005 | 8.49 |
2006 | 7.44 |
2007 | 6.49 |
2008 | 7 |
2009 | |
2010 | 6.65 |
2011 | 6.28 |
2012 | 6.11 |
2013 | 5.83 |
2014 | 4.92 |
2015 | 4.73 |
2016 | 4.5 |
2017 | 4.21 |
2018 | 3.83 |