Comprehensive Evaluation of Urban Economic Development in Yangtze River Delta Based on Cluster-Principal Component Analysis

Table 1

Data symbols and interpretation.

Mark	Meaning
G	GDP per capita
X1	Value added by the primary industry
X2	Value added by the secondary industry
X3	Value added by the tertiary industry
X4	Agriculture, forestry, animal husbandry and fishery
X5	Industrial added value
X6	Construction added value
X7	Wholesale and retail added value
X8	Total exports
X9	Total imports