6.4

2025

7.5

2009

7.6

2008

7.4

2021

6.2

2015

6.8

2022

7.0

1992

4.2

2015

6.4

1960

4.0

2014

8.0

2012

7.2

2016

3.4

2018

6.6

2018

3.8

2009

4.0

10.0

2018

6.0

2018

5.3

1943

6.5