1988

6.7

2006

5.8

2006

6.8

2002

6.1

1998

4.6

2004

5.3

1976

7.6

2002

7.5

2007

7.4

1963

7.7

2007

6.4

1996

6.8

2010

3.3

2007

7.5

2009

5.7

2005

7.1

2006

6.7

2023

6.4

1932

6.1

1939

6.4