1954

7.9

1976

7.0

1967

6.8

2006

8.0

2017

5.4

7.8

1961

7.5

2013

7.7

2012

6.4

2002

5.4

2006

6.9

1983

6.6

1931

6.9

2004

7.1

1985

6.1

1972

7.5

1921

8.1

1996

7.2

1966

6.4