1970

6.1

2017

6.0

1990

7.4

2024

6.9

1956

6.3

2012

5.5

1996

5.3

2006

6.3

2000

5.2

2015

6.4

2020

5.3

2005

5.7

1978

7.0

1932

6.2

5.8

1941

5.4

1988

5.5

1997

6.5

2009

5.0

1989

5.9