1996

6.4

2006

6.5

1979

7.3

2007

5.9

2005

6.7

1986

6.9

2004

6.5

1941

5.2

1937

5.4

1932

6.9

1930

6.9

1940

6.5

1957

7.0

2014

6.3

1954

7.2

2002

5.2

1997

6.9

2007

6.8

1953

7.0

10.0