2005

6.5

1971

8.2

1989

7.1

2008

6.0

2023

6.8

2004

6.7

2002

7.4

2003

7.1

1988

8.4

2011

5.8

1997

7.1

1970

6.1

1979

8.2

1998

8.2

2003

6.2

2009

6.3

2006

6.4

1975

8.0

2008

8.1

2001

5.9