1976

5.0

1998

7.0

2021

7.5

1987

5.7

1968

7.3

2010

6.2

1943

8.0

2004

6.0

1955

7.9

2007

5.7

1964

6.4

1960

6.5

1982

5.8

2012

4.9

1994

5.8

1934

6.8

2008

5.2

1970

6.3

1937

6.7

1984

3.9