2009

6.6

2014

6.0

2014

4.9

2015

6.0

2006

5.1

2007

6.8

2003

7.5

2005

6.0

2023

6.3

1999

5.7

2005

6.8

1976

6.6

2002

4.7

1988

7.3

1995

7.3

1993

7.2

2003

4.0

1967

6.3

2007

6.2

1989

6.3