1973

5.0

2015

5.4

2016

5.9

1989

5.8

1994

7.3

2016

6.3

2009

6.7

2016

6.4

2019

6.3

2013

4.0

2020

7.5

2010

6.3

2010

6.0

2023

7.7

2024

9.9

2021

4.6

1988

5.5

2018

6.0

2018

6.4