The Study of the Spatial Heterogeneity and Structural Evolution of the Producer Services Trade Network

Table 7

Core degree of the producer services trade network (Top 10).

Year	2000		2004		2008		2012
Rank	Country	Core	Country	Core	Country	Core	Country	Core
1	USA	0.626	USA	0.577	USA	0.679	USA	0.620
2	GBR	0.473	GBR	0.410	GBR	0.367	GBR	0.396
3	DEU	0.251	DEU	0.307	DEU	0.256	DEU	0.273
4	JPN	0.248	JPN	0.268	JPN	0.238	JPN	0.249
5	NLD	0.198	CAN	0.217	IRL	0.192	SUI	0.211
6	SUI	0.166	FRA	0.212	SUI	0.185	IRL	0.189
7	FRA	0.160	NLD	0.196	KOR	0.185	CAN	0.187
8	ITA	0.148	SUI	0.174	FRA	0.171	NLD	0.184
9	BEL	0.144	IRL	0.164	NLD	0.169	FRA	0.176
10	ESP	0.129	ESP	0.135	IND	0.152	SIN	0.124