1967

5.2

2002

6.1

1999

7.1

2008

5.9

1984

6.0

2006

6.8

2021

6.7

2023

5.7

2024

6.0

2021

7.2

1942

6.3

1986

6.2

1995

6.3

2017

6.7

2009

5.3

2005

7.0

2008

6.9

2011

4.4

1963

7.5

1951

7.1