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Table 5 SDE parameters of coupling coordination degree (D-values) from 2002 to 2020

From: Coupling analysis of population aging and economic growth with spatial-temporal variation: a case study in China

Year

Shape Area (104km2)

XStdDist (km)

YStdDist (km)

Rotation (o)

Y-axis/X- axis

2020

333.10

953.26

1112.34

36.67

1.17

2019

332.84

969.36

1093.01

41.18

1.13

2018

329.31

960.78

1091.08

39.87

1.14

2017

333.92

950.22

1118.65

35.26

1.18

2016

339.22

960.82

1123.87

33.43

1.17

2015

337.88

951.93

1129.89

33.24

1.19

2014

339.26

958.98

1126.14

32.99

1.17

2013

339.60

960.79

1125.14

33.46

1.17

2012

340.85

969.39

1119.26

34.94

1.15

2011

344.18

970.14

1129.33

35.25

1.16

2010

342.34

965.73

1128.43

33.60

1.17

2009

323.04

909.37

1130.81

33.90

1.24

2008

346.16

968.67

1137.55

35.77

1.17

2007

348.78

973.77

1140.16

36.93

1.17

2006

355.02

989.25

1142.40

41.86

1.15

2005

339.27

954.25

1131.77

33.12

1.19

2004

352.93

989.63

1135.25

42.81

1.15

2003

337.53

948.34

1132.98

36.71

1.19

2002

369.46

1021.66

1151.16

48.79

1.13