年度 | 实际值 |
---|---|
1995 | 2.3 |
1996 | 2.3 |
1997 | 2.7 |
1998 | 2 |
1999 | 2.2 |
2000 | 2 |
2001 | 1.77 |
2002 | 1.72 |
2003 | 1.38 |
2004 | 1.21 |
2005 | 1.22 |
2006 | 1.03 |
2007 | .85 |
2008 | .87 |
2009 | |
2010 | .75 |
2011 | .54 |
2012 | .46 |
2013 | 1.1 |
2014 | .94 |
2015 | .74 |
2016 | 0.71 |
2017 | 0.49 |
2018 | 0.28 |