年度 | 实际值 |
---|---|
1995 | 3.6 |
1996 | 3.7 |
1997 | 3.45 |
1998 | 39 |
1999 | 37.2 |
2000 | 35.3 |
2001 | 27.73 |
2002 | 31.58 |
2003 | 27.79 |
2004 | 31.21 |
2005 | 29.58 |
2006 | 27.94 |
2007 | 25.87 |
2008 | 25.64 |
2009 | |
2010 | 26.38 |
2011 | 26.24 |
2012 | 27.03 |
2013 | 26.53 |
2014 | 25.03 |
2015 | 24.17 |
2016 | 21.89 |
2017 | |
2018 | 18.69 |