年度 | 实际值 |
---|---|
1995 | 19.3 |
1996 | 19.4 |
1997 | 17.63 |
1998 | 16.3 |
1999 | |
2000 | 11.4 |
2001 | 10.34 |
2002 | 9.49 |
2003 | 8.54 |
2004 | 7.86 |
2005 | 6.66 |
2006 | 5.93 |
2007 | 5.85 |
2008 | 5.83 |
2009 | |
2010 | 5.26 |
2011 | 4.48 |
2012 | 4.01 |
2013 | 3.6 |
2014 | 3.61 |
2015 | 5.72 |
2016 | 5.43 |
2017 | 4.8 |
2018 | 4.49 |