2007

6.1

2017

7.0

1996

8.0

2015

5.1

1995

7.6

1997

3.5

2001

4.3

2005

7.5

2002

7.1

2005

6.3

2006

7.8

1987

6.1

1987

7.7

1936

7.1

1992

5.0

1971

5.1

2004

5.7

1999

5.0

1977

5.5

2020

7.7