α

β

R²

All years

1.359

4.555

15.64%

(2.175)

(3.205)

2015

2.984

4.159

12.13%

(4.922)

(0.466)*

2016

3.44

3.602

16.24%

(4.602)

(0.855)*

2017

2.848

3.713

17.39%

(7.641)

(1.534)*

2018

3.329

4.401

16.16%

(5.185)

(1.821)**

2019

3.144

3.269

21.91%

(3.678)

(1.688)*

2020

4.646

4.945

23.43%

(4.305)

(4.429)