1997

6.0

1999

6.8

2015

8.4

2014

6.5

2004

7.1

1988

5.5

2007

6.0

1968

6.9

2024

7.7

2015

7.0

2012

5.0

2023

7.2

2003

6.7

2010

6.1

2018

5.1

2007

5.3

2016

6.7

2010

6.1

2005

5.2

1995

5.7