年度 | 实际值 |
---|---|
1992 | 21.3 |
1993 | |
1994 | |
1995 | 21 |
1996 | |
1997 | |
1998 | |
1999 | 21 |
2000 | 3.89 |
2001 | 22 |
2002 | 21.96 |
2003 | 22.15 |
2004 | 22.28 |
2005 | 22.37 |
2006 | 22.76 |
2007 | 22.83 |
2008 | 22.82 |
2009 | 22.68 |
2010 | 20.88 |
2011 | 20 |
2012 | 19.99 |
2013 | 18.52 |
2014 | 18.55 |
2015 | 17.69 |