1973

4.9

2009

5.3

2005

5.0

1980

5.4

2009

5.4

1997

6.3

1997

5.0

1982

6.3

1972

6.2

1955

6.5

1918

0.0

2019

5.7

1966

6.0

2006

3.2

2018

5.6

2017

7.4

2006

5.1

2021

6.0

2002

6.8

1992

6.1