四个季度GDP加起来不等于年度GDP？这不科学呀！求指点，在线等，非常感谢

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Concept  Code	Country Label	Data Source Code	Unit Code	Frequency Label	Time Label	Value
NGDP	Japan	IFS	NAASA	Annual	1990	442781000000000
NGDP	Japan	IFS	NAASA	Annual	1991	469421800000000
NGDP	Japan	IFS	NAASA	Annual	1992	480782800000000
NGDP	Japan	IFS	NAASA	Annual	1993	483711800000000
NGDP	Japan	IFS	NAASA	Annual	1994	495743400000000
NGDP	Japan	IFS	NAASA	Annual	1995	501706900000000
NGDP	Japan	IFS	NAASA	Annual	1996	511934800000000
NGDP	Japan	IFS	NAASA	Annual	1997	523198300000000
NGDP	Japan	IFS	NAASA	Annual	1998	512438600000000
NGDP	Japan	IFS	NAASA	Annual	1999	504903200000000
NGDP	Japan	IFS	NAASA	Annual	2000	509860000000000
NGDP	Japan	IFS	NAASA	Annual	2001	505543200000000
NGDP	Japan	IFS	NAASA	Annual	2002	499147000000000
NGDP	Japan	IFS	NAASA	Annual	2003	498854800000000
NGDP	Japan	IFS	NAASA	Annual	2004	503725300000000
NGDP	Japan	IFS	NAASA	Annual	2005	503903000000000
NGDP	Japan	IFS	NAASA	Annual	2006	506687000000000
NGDP	Japan	IFS	NAASA	Annual	2007	512975200000000
NGDP	Japan	IFS	NAASA	Annual	2008	501209300000000
NGDP	Japan	IFS	NAASA	Annual	2009	471138700000000
NGDP	Japan	IFS	NAASA	Annual	2010	482384400000000
NGDP	Japan	IFS	NAASA	Annual	2011	470623200000000
NGDP	Japan	IFS	NAASA	Annual	2012	475867900000000

上表是IFS日本1990-2012年度名义GDP，日元标记。下表是IFS同时间段名义季度GDP，日元标记。
为什么四个季度GDP加起来不等于年度GDP呢？灰常困惑...（OECD与IFS数据相同）

NGDP	Japan	IFS	NAASA	Quarterly	1990 Q1	425345600000000
NGDP	Japan	IFS	NAASA	Quarterly	1990 Q2	441172700000000
NGDP	Japan	IFS	NAASA	Quarterly	1990 Q3	449621700000000
NGDP	Japan	IFS	NAASA	Quarterly	1990 Q4	453857200000000
NGDP	Japan	IFS	NAASA	Quarterly	1991 Q1	460976500000000
NGDP	Japan	IFS	NAASA	Quarterly	1991 Q2	469108000000000
NGDP	Japan	IFS	NAASA	Quarterly	1991 Q3	469877200000000
NGDP	Japan	IFS	NAASA	Quarterly	1991 Q4	476968700000000
NGDP	Japan	IFS	NAASA	Quarterly	1992 Q1	478120300000000
NGDP	Japan	IFS	NAASA	Quarterly	1992 Q2	482722300000000
NGDP	Japan	IFS	NAASA	Quarterly	1992 Q3	482744900000000
NGDP	Japan	IFS	NAASA	Quarterly	1992 Q4	480443000000000
NGDP	Japan	IFS	NAASA	Quarterly	1993 Q1	487425700000000
NGDP	Japan	IFS	NAASA	Quarterly	1993 Q2	482227900000000
NGDP	Japan	IFS	NAASA	Quarterly	1993 Q3	480975700000000
NGDP	Japan	IFS	NAASA	Quarterly	1993 Q4	484361600000000
NGDP	Japan	IFS	NAASA	Quarterly	1994 Q1	494986800000000
NGDP	Japan	IFS	NAASA	Quarterly	1994 Q2	492593800000000
NGDP	Japan	IFS	NAASA	Quarterly	1994 Q3	500100000000000
NGDP	Japan	IFS	NAASA	Quarterly	1994 Q4	495322700000000
NGDP	Japan	IFS	NAASA	Quarterly	1995 Q1	495061900000000
NGDP	Japan	IFS	NAASA	Quarterly	1995 Q2	501361100000000
NGDP	Japan	IFS	NAASA	Quarterly	1995 Q3	504829400000000
NGDP	Japan	IFS	NAASA	Quarterly	1995 Q4	505135600000000

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关键词：季度GDP 非常感谢 GDP 求指点 在线等 1990 1991

强烈怀疑这个所谓季度GDP就是年度的啊，可是明明是'Quarterly数据呀！求高人指点...

有差异

stanley822 发表于 2013-4-25 13:42
有差异

是有差异。明明标明了是季度数据却与年度数据类似，搞不懂呢

求高人指点，遇到了同样的问题