年度 | 实际值 |
---|---|
1995 | 26.7 |
1996 | 25.4 |
1997 | 35.74 |
1998 | 23.2 |
1999 | |
2000 | 24.6 |
2001 | 22.33 |
2002 | 24.35 |
2003 | 22.56 |
2004 | 24.53 |
2005 | 26.32 |
2006 | 25.2 |
2007 | 23.62 |
2008 | 23.58 |
2009 | |
2010 | 8.38 |
2011 | 7.55 |
2012 | 7.14 |
2013 | 7.04 |
2014 | 6.77 |
2015 | 6.16 |
2016 | 5.99 |
2017 | 5.75 |
2018 | 5.55 |