年度 | 实际值 |
---|---|
1995 | 35.1 |
1996 | 31.4 |
1997 | 29.27 |
1998 | 29.4 |
1999 | 21 |
2000 | 16.3 |
2001 | 19.63 |
2002 | 19.1 |
2003 | 18.5 |
2004 | 18.27 |
2005 | 18.25 |
2006 | 17.74 |
2007 | 16.58 |
2008 | 15 |
2009 | |
2010 | 15.68 |
2011 | 14.99 |
2012 | 15.67 |
2013 | 16.54 |
2014 | 16.81 |
2015 | 17.34 |
2016 | 16.53 |
2017 | |
2018 | 18.05 |