1963

5.7

1953

7.9

1971

6.7

1951

7.7

1972

8.7

2013

6.1

1931

8.1

1966

8.0

2012

4.8

1953

8.2

1957

8.1

1975

7.5

2012

7.5

2011

5.9

1951

7.0

2001

7.0

2008

5.8

1992

7.3

1958

8.0

1980

6.7