年度 | 实际值 |
---|---|
1995 | 35 |
1996 | 35.3 |
1997 | 31.46 |
1998 | 25.7 |
1999 | |
2000 | 28.1 |
2001 | 29.05 |
2002 | 31.59 |
2003 | 28.96 |
2004 | 29.31 |
2005 | 36.05 |
2006 | 34.67 |
2007 | 34.19 |
2008 | 34.14 |
2009 | |
2010 | 36.42 |
2011 | 39.22 |
2012 | 40.46 |
2013 | 38.78 |
2014 | 39.85 |
2015 | 39.77 |
2016 | 38.95 |
2017 | |
2018 | 35.23 |