年度 | 实际值 |
---|---|
1995 | .6 |
1996 | 2 |
1997 | 1.99 |
1998 | 2.4 |
1999 | 2.6 |
2000 | 2.7 |
2001 | 2.41 |
2002 | 2.57 |
2003 | 2.25 |
2004 | 1.98 |
2005 | 1.18 |
2006 | 1.02 |
2007 | .89 |
2008 | .88 |
2009 | |
2010 | .79 |
2011 | .68 |
2012 | .69 |
2013 | .68 |
2014 | .63 |
2015 | .61 |
2016 | 0.51 |
2017 | 0.43 |
2018 | 0.39 |