年度 | 实际值 |
---|---|
1995 | 3.4 |
1996 | 3 |
1997 | 1.55 |
1998 | 2.8 |
1999 | .2 |
2000 | 2.5 |
2001 | 2.21 |
2002 | 2.04 |
2003 | 1.94 |
2004 | 1.79 |
2005 | 1.81 |
2006 | 1.58 |
2007 | 1.82 |
2008 | 1.47 |
2009 | |
2010 | 1.19 |
2011 | .96 |
2012 | .66 |
2013 | .61 |
2014 | .81 |
2015 | .46 |
2016 | 4.01 |
2017 | 3.2 |
2018 | 2.92 |