1976

5.5

1977

5.9

2014

6.1

2022

4.5

1967

5.6

1959

6.8

2013

3.9

2008

7.1

2004

6.2

2017

7.9

2003

6.3

1995

6.2

2006

5.0

2007

5.3

1968

6.9

2001

6.9

2020

6.5

1984

6.6

2008

5.7

1977

6.2