1968

6.2

5.3

2017

5.9

2007

5.7

1984

6.5

2017

4.6

2011

5.6

2010

5.5

2006

6.5

1935

4.8

2020

6.7

2023

10.0

1999

7.5

2004

5.0

2005

5.7

2014

7.0

1980

6.6

2022

8.1