1956

7.6

1976

7.0

1984

6.0

2005

7.3

1944

7.2

2004

6.0

2002

5.3

2001

6.3

2007

6.3

1975

5.7

2007

7.3

2007

6.3

1974

5.7

1963

9.0

1999

6.3

1935

5.0

1964

6.1

2008

6.6

1987

6.0

1998

6.3