年度 | 实际值 |
---|---|
1995 | 12 |
1996 | 11.8 |
1997 | 10.18 |
1998 | |
1999 | 7.4 |
2000 | 6.3 |
2001 | 5.45 |
2002 | 4.51 |
2003 | 2.96 |
2004 | 2.4 |
2005 | .9 |
2006 | .45 |
2007 | .38 |
2008 | .33 |
2009 | |
2010 | .39 |
2011 | .38 |
2012 | .37 |
2013 | .37 |
2014 | .35 |
2015 | .34 |
2016 | 0.35 |
2017 | |
2018 | 0.3 |