1982

5.2

2004

7.9

1977

7.1

1997

8.4

2015

7.8

2005

7.1

1969

6.0

2006

6.7

2006

4.9

1996

6.2

1970

7.5

2005

7.7

1982

7.6

1966

7.2

1961

8.0

1957

7.8

2001

7.4

1998

8.2

2024

5.3

1979

6.9