年度 | 实际值 |
---|---|
1997 | 41.27 |
1998 | 35.2 |
1999 | 32.5 |
2000 | 29.3 |
2001 | 28.33 |
2002 | 26.93 |
2003 | 25.82 |
2004 | 25.35 |
2005 | 29.75 |
2006 | 28.93 |
2007 | 29.67 |
2008 | 30.11 |
2009 | |
2010 | 27.6 |
2011 | 25.42 |
2012 | 24.48 |
2013 | 23.9 |
2014 | 23.44 |
2015 | 22.19 |
2016 | 22.16 |
2017 | |
2018 | 19.44 |