Table 2 Sample statistics of provincial-level regions in the Chinese mainland.

Anhui

510

12,774

2,199

22,117

1,339

15,778

Beijing

449

26,275

1,044

10,448

1,004

15,771

Fujian

632

18,541

1,150

18,401

2,689

24,315

Gansu

685

18,479

1,682

19,499

2,302

18,719

Guangdong

204

6,678

547

6,292

1,758

23,769

Guangxi

68

336

329

4,904

522

22,428

Guizhou

139

1,503

264

3,954

740

26,320

Hainan

148

1,434

798

7,188

2,436

18,842

Hebei

2,327

18,501

1,877

19,053

2,053

14,846

Henan

461

10,280

539

7,276

450

14,026

Heilongjiang

841

20,086

2,143

23,541

2,588

22,625

Hubei

180

4,232

1,046

10,043

1,088

16,832

Hunan

64

904

432

6,285

593

17,988

Jilin

669

8,443

2,048

14,023

1,793

19,125

Jiangsu

1,988

20,843

1,356

17,768

1,715

17,312

Jiangxi

152

7,727

443

6,034

1,787

19,573

Liaoning

3,480

24,889

4,274

23,162

5,495

22,882

Inner Mongolia

1,253

19,441

1,207

15,790

1,926

40,678

Ningxia

954

15,168

1,320

13,140

1,934

16,692

Qinghai

108

14,357

885

11,175

1,309

8,912

Shandong

2,028

20,809

3,452

15,590

3,271

12,891

Shanxi

1,407

26,322

1,225

13,879

1,996

23,100

Shaanxi

1,798

24,962

1,672

18,663

3,361

23,997

Shanghai

544

21,764

984

14,640

2,945

18,019

Sichuan

1,045

21,186

2,200

19,100

6,805

42,086

Tianjin

466

24,622

862

8,174

1,199

14,144

Xinjiang

956

22,185

3,606

28,171

5,674

105,535

Yunnan

511

11,562

1,586

16,024

1,913

22,342

Zhejiang

2,261

23,996

2,501

23,243

2,458

24,866

Total

26,328

448,299

43,671

417,577

65,143

684,413