2001

6.2

2003

7.8

2002

7.3

1972

7.8

1987

8.1

1985

7.2

1957

8.1

2001

6.7

1997

7.5

2002

6.6

1994

6.3

1980

6.6

1982

6.4

1988

7.5

2001

6.8

1953

8.0

2001

5.4

1974

7.8

2006

7.5

1955

7.5