年度 | 实际值 |
---|---|
1995 | 31.6 |
1996 | 31.7 |
1997 | 31.2 |
1998 | 32.8 |
1999 | 35 |
2000 | 33.9 |
2001 | 33.6 |
2002 | 34.18 |
2003 | 32.07 |
2004 | 30.99 |
2005 | 35.69 |
2006 | 34.69 |
2007 | 34.41 |
2008 | 32.34 |
2009 | |
2010 | 26.95 |
2011 | 24.12 |
2012 | 23.71 |
2013 | 25.94 |
2014 | 32.82 |
2015 | 34.93 |
2016 | 35.81 |
2017 | |
2018 | 37.44 |