2001

7.0

1967

6.6

2005

7.8

1986

8.0

2014

5.6

2005

6.5

1996

6.4

1998

6.8

1987

6.5

1987

7.5

2002

8.4

2003

8.5

1997

7.6

2004

7.3

2007

6.3

1972

6.4

1956

7.3

1955

6.0

1977

7.3

1985

6.7