2003

5.0

1984

5.0

1975

4.8

2007

6.6

1995

7.3

1990

7.0

2002

6.6

2004

6.4

2006

7.6

2006

6.6

2001

6.1

2000

6.3

2007

6.1

2005

6.7

1994

7.1

1997

4.6

1995

6.0

2003

6.4

1967

7.6

2005

6.1