年度 | 实际值 |
---|---|
1995 | 20.4 |
1996 | 19.6 |
1997 | 13.95 |
1998 | 15.3 |
1999 | 15 |
2000 | 14.4 |
2001 | 13.88 |
2002 | 12.78 |
2003 | 10.73 |
2004 | 9.36 |
2005 | 7.25 |
2006 | 6.29 |
2007 | 5.84 |
2008 | 4.76 |
2009 | |
2010 | 4.37 |
2011 | 4.02 |
2012 | 4.02 |
2013 | 4.25 |
2014 | 4.37 |
2015 | 4.87 |
2016 | 4.83 |
2017 | |
2018 | 3.89 |