年份

x₁

x₂

x₃

x₄

x₅

x₆

x₇

x₈

2010

1

1

1

1

1

1

1

1

2011

0.8999

0.9463

0.8889

0.8683

0.9745

0.9491

0.9727

0.9743

2012

0.8481

0.8999

0.7878

0.7825

0.9846

0.9732

0.9540

0.9596

2013

0.7994

0.8600

0.7050

0.7214

0.9977

0.9011

0.9364

0.9476

2014

0.7612

0.8287

0.6319

0.6719

0.9921

0.8662

0.9156

0.9406

2015

0.7317

0.8017

0.5607

0.6083

0.9693

0.8935

0.8969

0.9334

2016

0.6997

0.7594

0.4810

0.5374

0.9388

0.8524

0.8828

0.9326

2017

0.6470

0.7143

0.4167

0.4553

0.9273

0.8869

0.8504

0.9181

2018

0.5996

0.6784

0.3644

0.3969

0.9194

0.9278

0.8161

0.9018

2019

0.5608

0.6494

0.3333

0.3829

0.9352

0.9113

0.7729

0.8759

灰色关联度系数

0.7548

0.8138

0.6170

0.6425

0.9639

0.9161

0.8998

0.9384

排序

6

5

8

7

1

3

4

2