年度 | 实际值 |
---|---|
1995 | 31.5 |
1996 | 30.4 |
1997 | 27.93 |
1998 | 23.6 |
1999 | 18.6 |
2000 | 17.7 |
2001 | 16.54 |
2002 | 14.71 |
2003 | 13.39 |
2004 | 12.82 |
2005 | 12.65 |
2006 | 11.42 |
2007 | 10.83 |
2008 | 10.64 |
2009 | |
2010 | 9.52 |
2011 | 9.33 |
2012 | 9.15 |
2013 | 9.32 |
2014 | 8.67 |
2015 | 8.53 |
2016 | 8.47 |
2017 | |
2018 | 7.82 |