2001

7.0

1991

6.8

2006

7.0

2007

4.0

1976

6.3

2004

7.1

1986

7.2

1997

5.6

1903

6.8

2004

5.8

2014

6.2

2006

7.5

1955

6.8

2007

6.0

2014

6.3

2010

7.6

1985

6.2

1987

4.9

1988

5.0

1989

6.5