年度 | 实际值 |
---|---|
1995 | 4.2 |
1996 | 3.2 |
1997 | 3.95 |
1998 | 2.5 |
1999 | 1.9 |
2000 | 1.9 |
2001 | 1.78 |
2002 | 1.36 |
2003 | 1.12 |
2004 | 1.02 |
2005 | .7 |
2006 | .67 |
2007 | .65 |
2008 | .66 |
2009 | |
2010 | .56 |
2011 | .49 |
2012 | .44 |
2013 | .38 |
2014 | .53 |
2015 | .46 |
2016 | 0.4 |
2017 | 0.31 |
2018 | 0.27 |