年度 | 实际值 |
---|---|
1995 | 21.3 |
1996 | 20 |
1997 | 20.86 |
1998 | 22.5 |
1999 | 22.9 |
2000 | 22.5 |
2001 | 21.25 |
2002 | 20.82 |
2003 | 21.58 |
2004 | 20.68 |
2005 | 15.7 |
2006 | 16.2 |
2007 | 15.93 |
2008 | 16.11 |
2009 | |
2010 | 17.12 |
2011 | 17.02 |
2012 | 17.1 |
2013 | 17.48 |
2014 | 16.09 |
2015 | 15.17 |
2016 | 14.95 |
2017 | |
2018 | 15.75 |