1968

5.8

1976

7.2

2001

6.1

2019

7.1

2009

5.4

1993

8.6

2006

5.9

1943

8.2

1945

8.0

2005

7.2

2006

7.4

2016

6.8

1938

5.5

1994

6.2

1976

6.6

1965

6.8

2003

6.3

1991

6.2

2002

6.0

2009

6.1