1979

7.0

1988

7.0

1987

7.0

1988

7.0

2008

6.7

2009

5.2

1985

6.5

1943

6.3

1946

6.3

1989

6.3

2005

6.3

2017

7.0

1986

6.8

1994

6.2

1976

7.3

1968

6.9

2016

7.2

2018

7.8

2007

7.9

2010

7.0