年度 | 实际值 |
---|---|
1995 | 23.7 |
1996 | 23.5 |
1997 | 18.25 |
1998 | 22.7 |
1999 | 16 |
2000 | 18.1 |
2001 | 14.07 |
2002 | 15.88 |
2003 | 13.98 |
2004 | 13.63 |
2005 | 8.58 |
2006 | 8.04 |
2007 | 7.15 |
2008 | 6.56 |
2009 | |
2010 | 5.25 |
2011 | 4.88 |
2012 | 4.71 |
2013 | 4.91 |
2014 | 4.97 |
2015 | 5.48 |
2016 | 5.86 |
2017 | |
2018 | 6 |