Perturbation

7.5

/

1996

6.4

/

1971

7.2

/

2023

6.4

/

2020

6.8

/

2022

5.6

/

2009

6.2

/

2021

7.4

/

2021

5.9

/

1939

7.2

/

2020

7.5

/

2020

6.1

/

1910

7.8

/

2016

6.6

/

1934

8.7

/

2020

5.5

/

2020

8

/

2020

8

/

2020

9.5

/

2015

8.2

/

2013

10

/

2023

10

/

2007

6.441

/

2015

6.386

/

2020

6.964

/

1985

7.026

/

1975

8.4

/

2005

5.893

/

2011

6.6

/

2003

6.841

/

2023

5.2

/

1958

8.4

/

2015

7.1

/

NaN

7.516

/

2020

7.7

/

2024

9.9

/

2004

6

/

2024

6

/

2018

6.541

/

1972

5.798

/

2023