年度 | 实际值 |
---|---|
1992 | 51 |
1993 | |
1994 | |
1995 | 52 |
1996 | |
1997 | |
1998 | |
1999 | 52.5 |
2000 | 53 |
2001 | 53 |
2002 | 53.4 |
2003 | 54 |
2004 | 54 |
2005 | 54 |
2006 | 55 |
2007 | 56 |
2008 | 57 |
2009 | 58 |
2010 | 58 |
2011 | 59 |
2012 | 61 |
2013 | 62 |
2014 | 63 |
2015 | 64 |
2016 | 64 |
2017 | 64 |