1997

7.0

1937

4.9

1962

7.5

2001

5.9

1992

6.2

1998

7.2

1989

6.2

1955

7.2

2006

7.1

1995

7.2

2020

5.0

1976

6.7

1969

7.0

2002

5.2

2002

6.5

1988

7.1

2004

6.9

1990

6.2

2015

6.3

2016

6.3