年度 | 实际值 |
---|---|
1995 | 21.8 |
1996 | 21 |
1997 | 20.88 |
1998 | 21.3 |
1999 | |
2000 | |
2001 | |
2002 | 35.46 |
2003 | 30.96 |
2004 | 29.54 |
2005 | 26.7 |
2006 | 22.65 |
2007 | 22.15 |
2008 | 21.16 |
2009 | |
2010 | 18.6 |
2011 | 19.13 |
2012 | 18.16 |
2013 | 18.54 |
2014 | 17.29 |
2015 | 17.27 |
2016 | 16.36 |
2017 | |
2018 | 16.59 |