年度 | 实际值 |
---|---|
1995 | 2.5 |
1996 | 2.2 |
1997 | 20.34 |
1998 | 2 |
1999 | 1.4 |
2000 | 1.6 |
2001 | 1.68 |
2002 | 1.77 |
2003 | 1.34 |
2004 | 1.28 |
2005 | 1.27 |
2006 | 1.01 |
2007 | .81 |
2008 | .85 |
2009 | |
2010 | .87 |
2011 | .66 |
2012 | .58 |
2013 | .51 |
2014 | .48 |
2015 | 1.84 |
2016 | 1.89 |
2017 | 1.73 |
2018 | 1.67 |