2002

8.4

1999

5.9

1994

8.5

1980

6.4

2004

7.9

2007

6.5

2006

6.7

1981

5.9

7.8

2011

7.5

1989

7.1

1995

7.8

1986

8.0

2005

7.8

1974

6.5

1931

8.3

2023

6.1

2002

7.8

1965

7.9

2011

6.6