α

β

R²

All years

1589

4284

712%

(4.98)

(7.40)

2015

2.27

6.256

8.60%

(6.067)

(2.483)***

2016

1.97

4.381

22.36%

(5.847)

(2.836)

2017

2.278

2.866

13.46%

(8.818)

(2.558)***

2018

2.436

1.377

12.89%

(8.800)

(1.066)*

2019

2.057

2.587

17.62%

(4.167)

(2.243)***

2020

1.765

3.624

23.56%

(2.010)

(3.422)