1994

5.3

1996

5.7

1962

7.0

1986

6.5

1938

7.1

1973

6.1

1988

7.7

1937

7.2

1970

7.0

1963

7.5

1960

6.7

2009

6.7

1946

6.3

1966

7.3

1988

5.8

2009

5.8

2007

8.2

1996

7.5

1980

6.1

2005

6.4