年度 | 实际值 |
---|---|
1998 | 33.3 |
1999 | 31.8 |
2000 | 32.2 |
2001 | 28.88 |
2002 | 26.41 |
2003 | 25.19 |
2004 | 25.97 |
2005 | 23.1 |
2006 | 19.76 |
2007 | 20.5 |
2008 | 19.7 |
2009 | |
2010 | 18.11 |
2011 | 15.27 |
2012 | 15 |
2013 | 14.46 |
2014 | 13.57 |
2015 | 13.01 |
2016 | 12.62 |
2017 | 11.45 |
2018 | 10.71 |