Table 2 Principal component analysis results.

From: Analysis of spatiotemporal evolution and driving factors of ecological environment quality in the Ili-Balkhash Lake Basin in Central Asia

Year

PC1

PC2

PC3

PC4

2000

94.161

4.678

1.160

0.001

2001

89.597

8.656

1.746

0.001

2002

94.303

4.872

0.809

0.016

2003

91.545

7.000

1.455

0.000

2004

91.877

7.207

0.913

0.003

2005

91.863

6.863

1.273

0.000

2006

88.554

9.962

1.478

0.006

2007

93.537

5.692

0.771

0.001

2008

92.543

6.816

0.640

0.000

2009

91.816

6.947

1.237

0.000

2010

95.173

4.060

0.767

0.000

2011

88.042

10.427

1.527

0.004

2012

87.250

11.754

0.995

0.001

2013

88.143

10.563

1.294

0.000

2014

92.603

6.302

1.094

0.001

2015

92.612

6.068

1.320

0.000

2016

89.762

9.057

1.169

0.012

2017

91.070

8.030

0.900

0.000

2018

92.874

6.200

0.926

0.000

2019

88.025

9.771

2.204

0.000

2020

94.161

4.678

1.160

0.001

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