2015

5.3

2018

7.5

1999

7.9

2018

6.6

1968

7.3

2017

6.9

1997

7.6

2018

7.6

2018

6.9

2007

7.5

2010

4.4

2009

6.7

2008

6.5

2021

6.8

2023

7.8

2017

7.0

2016

5.9

1976

6.4

1976

8.1

2022

6.0