年度 | 实际值 |
---|---|
1995 | 2 |
1996 | 2.7 |
1997 | 5.44 |
1998 | 3.1 |
1999 | 3 |
2000 | 2.8 |
2001 | 2.61 |
2002 | 2.6 |
2003 | 2.39 |
2004 | 2.63 |
2005 | 2.5 |
2006 | 2.36 |
2007 | 2.38 |
2008 | 2 |
2009 | |
2010 | 1.76 |
2011 | 2.21 |
2012 | 2.21 |
2013 | 2.18 |
2014 | 2.14 |
2015 | 2.17 |
2016 | 2.29 |
2017 | 2.02 |
2018 | 3.18 |