1990

6.0

2002

7.0

1998

6.8

2011

1.0

1986

6.7

1998

5.7

1978

6.8

1999

5.0

1946

5.8

1999

6.0

1987

6.9

1892

4.7

1892

3.7

1967

6.5

2018

6.8

2023

7.2

2008

6.2

1987

7.2

2004

6.5

1997

7.6