年度 | 实际值 |
---|---|
1995 | 19 |
1996 | |
1997 | |
1998 | |
1999 | 18.8 |
2000 | 18.59 |
2001 | 18.6 |
2002 | 18.67 |
2003 | 18.69 |
2004 | 18.43 |
2005 | 18.09 |
2006 | 17.89 |
2007 | 17.59 |
2008 | 17.37 |
2009 | 17.24 |
2010 | 17.39 |
2011 | 17.07 |
2012 | 16.73 |
2013 | 16.82 |
2014 | 16.66 |
2015 | 16.52 |
2016 | 16.5 |
2017 | 15.7 |
2018 | 15.4241 |