历年

⊿t

⊿f

⊿s

历年

⊿t

⊿f

⊿s

历年

⊿t

⊿f

⊿s

1978

0.466

10.855

1.050

2002

1.507

26.461

1.101

2013

2.937

9.198

4.734

1980

0.501

8.863

1.050

2003

1.898

21.937

1.762

2014

3.081

9.373

5.027

1985

0.737

10.567

1.270

2004

1.694

22.065

1.879

2015

3.217

9.510

5.294

1990

1.171

14.212

2.047

2005

1.732

22.306

1.598

2016

3.499

10.024

5.899

1995

1.099

16.665

1.050

2006

1.903

22.130

1.884

2017

3.384

9.378

5.914

1996

1.199

18.189

1.050

2007

1.682

18.025

1.898

2018

3.168

8.486

6.061

1997

1.218

15.694

0.613

2008

2.686

8.567

4.408

2019

3.215

8.319

5.903

1998

1.149

18.399

0.713

2009

2.964

7.394

5.569

2020

3.457

8.585

6.543

1999

1.082

17.822

1.014

2010

2.713

8.150

4.971

综合

2.146

12.538

3.350

2000

1.573

18.914

1.398

2011

2.813

8.230

5.178

2001

1.613

19.502

1.293

2012

2.786

8.977

4.459